0001670076-23-000071 | 10-Q | XBRL Viewer | Frontier Group Holdings INC

Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

As of June 30, 2023, the Company’s firm aircraft and engine purchase orders consisted of the following:


	A320neo	A321neo	Total Aircraft(a)	Engines
Year Ending
Remainder of 2023	—	7	7	2
2024	—	24	24	2
2025	17	24	41	4
2026	19	22	41	4
2027	21	21	42	3
Thereafter	10	52	62	2
Total	67	150	217	17

__________________

(a) While the schedule presented reflects the contractual delivery dates as of June 30, 2023, the Company has recently experienced modest delays in the deliveries of Airbus aircraft which may persist in future periods.

Contractual Obligation, Fiscal Year Maturity

As of June 30, 2023, purchase commitments for these aircraft and engines, including estimated amounts for contractual price escalations and PDPs, consisted of the following:


(in millions)	Total
Remainder of 2023	$	417
2024	1,448
2025	2,437
2026	2,357
2027	2,447
Thereafter	3,757
Total	$	12,863

Multiemployer Plan

The table below sets forth the Company’s employee groups and status of the collective bargaining agreements as of June 30, 2023:

Percentage of Workforce

Employee Group

Representative

Amendable Date(a)

June 30, 2023

Pilots

Air Line Pilots Association (ALPA)

January 2024

31%

Flight Attendants

Association of Flight Attendants (AFA-CWA)

May 2024

49%

Aircraft Technicians

International Brotherhood of Teamsters (IBT)

May 2025

Aircraft Appearance Agents

IBT

October 2023

Dispatchers

Transport Workers Union (TWU)

December 2021(b)

Material Specialists

IBT

March 2022(b)

<1%

Maintenance Controllers

IBT

October 2023

<1%

__________________

(a) Subject to standard early opener provisions.

(b) The Company’s collective bargaining agreements with its dispatchers and material specialists, represented by TWU and IBT, respectively, were still amendable as of June 30, 2023 and negotiations are ongoing; however, each agreement is operating under its current arrangement until an amendment has been reached.

- Definition

Tabular disclosure of information about multiemployer plan.

+ References

+ Details

Debt

6 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

Debt

The Company’s debt obligations are as follows (in millions):


	June 30, 2023		December 31, 2022
Secured debt:
Pre-delivery credit facility(a)	$	270	$	277
Floating rate building note(b)	17		17
Unsecured debt:
Affinity card advance purchase of mileage credits(c)	80		71
PSP Promissory Notes(d)	66		66
Total debt	433		431
Less current maturities of long-term debt	(237)		(157)
Less debt acquisition costs and other discounts, net	(3)		(2)
Long-term debt, net	$	193	$	272

__________________

(a)The Company, through an affiliate, entered into the pre-delivery payment (“PDP”) facility with Citibank, N.A., as facility agent, in December 2014 (as amended from time to time, the “PDP Financing Facility”). The PDP Financing Facility is primarily collateralized by the Company’s purchase agreement for Airbus A320 family aircraft deliveries (see Note 9) through the term of the facility, which extends through December 2025. As of June 30, 2023, the PDP Financing Facility allows for total commitments of up to $270 million.

Interest is paid every 90 days based on the Secured Overnight Financing Rate ("SOFR") plus a margin for each individual tranche. The PDP Financing Facility consists of separate loans for each PDP aircraft. Each separate loan matures upon the earlier of (i) delivery of that aircraft to the Company by Airbus, (ii) the date one month following the last day of the scheduled delivery month of such aircraft and (iii) if there is a delay in delivery of aircraft, depending on the cause of the delivery delay, up to six months following the last day of the scheduled delivery month of such aircraft. The PDP Financing Facility will be repaid periodically according to the preceding sentence, with the last scheduled delivery of aircraft expected to be in the fourth quarter of 2025.

(b)Represents a note with a commercial bank related to the Company’s headquarters building. Under the terms of the note, the Company began repaying the outstanding principal balance with quarterly payments beginning in January 2022 and continuing until the maturity date in December 2023. On the maturity date, one final balloon payment will be made to cover all unpaid principal, accrued unpaid interest and other amounts due. The interest rate of one-month SOFR plus a margin is payable monthly.

(c)The Company entered into an agreement with Barclays in 2003 which, as amended, provides for joint marketing, grants certain benefits to Cardholders and allows Barclays to market using the Company’s customer database, through 2029. Cardholders earn mileage credits under the Frontier Miles program and the Company sells mileage credits at agreed-upon rates to Barclays and earns fees from Barclays for the acquisition, retention and use of the co-branded credit card by Cardholders. In addition, Barclays will pre-purchase miles if the Company meets certain conditions precedent. The pre-purchased miles facility amount is to be reset on January 15 of each calendar year through, and including, January 15, 2028, based on the aggregate amount of fees payable by Barclays to the Company on a calendar year basis, up to an aggregate maximum facility amount of $200 million. The Company pays interest on a monthly basis, which is based on a one-month Effective Federal Funds Rate ("EFFR") plus a margin. Beginning March 31, 2028, the facility is scheduled to be repaid in 12 equal monthly installments.

(d)As a result of the Company’s participation in the payroll support programs offered by the U.S. Department of the Treasury (the “Treasury”), the Company obtained a series of 10-year, low-interest loans from the Treasury (collectively, the “PSP Promissory Notes”) that are due between 2030 to 2031. The PSP Promissory Notes include an annual interest rate of 1.00% for the first five years and the SOFR plus 2.00% in the final five years, with bi-annual interest payments. The loans can be prepaid at par at any time without incurring a penalty.

In connection with the term loan facility entered into with the Treasury on September 28, 2020 (the “Treasury Loan”), which was repaid in full on February 2, 2022, and the PSP Promissory Notes, the Company issued to the Treasury warrants to purchase 3,117,940 shares of FGHI common stock at a weighted-average price of $6.95 per share. The Treasury has not exercised any warrants as of June 30, 2023.

Cash payments for interest related to debt were $12 million and $5 million for the six months ended June 30, 2023 and 2022, respectively.

The Company has caused standby letters of credit and surety bonds to be issued to various airport authorities and vendors that are collateralized by a portion of the Company’s property and equipment and, as of June 30, 2023 and December 31, 2022, the Company did not have any outstanding letters of credit that were drawn upon.

As of June 30, 2023, future maturities of debt are payable as follows (in millions):


	June 30, 2023
Remainder of 2023	$	102
2024	163
2025	22
2026	—
2027	—
Thereafter	146
Total debt principal payments	$	433

The Company continues to monitor covenant compliance with various parties, including, but not limited to, its lenders and credit card processors, and as of June 30, 2023, the Company was in compliance with all of its covenants.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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+ Details

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ 58	$ (108)
Deferred income taxes	13	(45)
Depreciation and amortization	23	28
Gains recognized on sale-leaseback transactions	(57)	(28)
Loss on extinguishment of debt	0	7
Stock-based compensation	7	7
Amortization of cash flow hedges, net of tax	1	1
Changes in operating assets and liabilities:
Accounts receivable	28	(6)
Supplies and other current assets	9	(34)
Aircraft maintenance deposits	(9)	(10)
Other long-term assets	(93)	(42)
Accounts payable	6	8
Air traffic liability	40	99
Other liabilities	(60)	56
Cash provided by (used in) operating activities	(34)	(67)
Cash flows from investing activities:
Capital expenditures	(23)	(14)
Pre-delivery deposits for flight equipment, net of refunds	(9)	(41)
Other	(1)	(2)
Cash provided by (used in) investing activities	(33)	(57)
Cash flows from financing activities:
Proceeds from issuance of debt, net of issuance costs	52	141
Principal repayments on debt	(51)	(189)
Proceeds from sale-leaseback transactions	89	23
Proceeds from the exercise of stock options	1	0
Minimum tax withholdings on share-based awards	(5)	(3)
Cash provided by (used in) financing activities	86	(28)
Net increase (decrease) in cash, cash equivalents and restricted cash	19	(152)
Cash, cash equivalents and restricted cash, beginning of period	761	918
Cash, cash equivalents and restricted cash, end of period	$ 780	$ 766

Stock-Based Compensation - Stockholders' Equity (Details) - $ / shares	Jun. 30, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance (in shares)	750,000,000	750,000,000
Preferred stock authorized for issuance (in shares)	10,000,000	10,000,000
Common stock, stated par (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Nonvoting Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance (in shares)	150,000,000	150,000,000
Common stock, stated par (in dollars per share)	$ 0.001	$ 0.001

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Debt - Schedule of Debt Obligations (Details) - USD ($) $ / shares in Units, $ in Millions		6 Months Ended
	Apr. 30, 2020	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt, gross		$ 433	$ 431
Less current maturities of long-term debt		(237)	(157)
Less debt acquisition costs and other discounts, net		(3)	(2)
Long-term debt, net		$ 193	272
Periodic payment, interest, period		90 days
CARES Act Credit Agreement, Warrants
Debt Instrument [Line Items]
Warrants to acquire common stock (in shares)		3,117,940
Exercise price of warrants (in dollars per share)		$ 6.95
Warrants exercised (in shares)		0
Secured Debt \| PDP Financing Facility
Debt Instrument [Line Items]
Long-term debt, gross		$ 270	277
Amount of unsecured borrowings available		270
Secured Debt \| Floating rate building note
Debt Instrument [Line Items]
Long-term debt, gross		17	17
Unsecured Debt \| Affinity card advance purchase of mileage credits
Debt Instrument [Line Items]
Long-term debt, gross		80	71
Amount of unsecured borrowings available		200
Unsecured Debt \| PSP Promissory Notes
Debt Instrument [Line Items]
Long-term debt, gross		$ 66	$ 66
Interest rate		1000000.00%
Interest rate period		5 years
Unsecured Debt \| PSP Promissory Notes \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, variable interest rate		2000000.00%
Unsecured Debt \| PSP1 Promissory Note
Debt Instrument [Line Items]
Loan term	10 years

Commitments and Contingencies - Collective Bargaining Agreements (Details)	6 Months Ended
	Jun. 30, 2023
Multiemployer Plan [Line Items]
Amount of employees represented by unions	86.00%
Pilots
Multiemployer Plan [Line Items]
Amount of employees represented by unions	31.00%
Flight Attendants
Multiemployer Plan [Line Items]
Amount of employees represented by unions	49.00%
Aircraft Technicians
Multiemployer Plan [Line Items]
Amount of employees represented by unions	4.00%
Aircraft Appearance Agents
Multiemployer Plan [Line Items]
Amount of employees represented by unions	1.00%
Dispatchers
Multiemployer Plan [Line Items]
Amount of employees represented by unions	1.00%
Material Specialists
Multiemployer Plan [Line Items]
Amount of employees represented by unions	1.00%
Maintenance Controllers
Multiemployer Plan [Line Items]
Amount of employees represented by unions	1.00%

- Definition

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+ Details

Net Earnings (Loss) per Share (Tables)

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share Basic And Diluted

The following table sets forth the computation of net earnings (loss) per share on a basic and diluted basis pursuant to the two-class method for the periods indicated (in millions, except for share and per share amounts):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Basic:
Net income (loss)	$	71	$	13	$	58	$	(108)
Less: net income attributable to participating rights	(2)		—		(2)		—
Net income (loss) attributable to common stockholders	$	69	$	13	$	56	$	(108)
Weighted-average common shares outstanding, basic	219,402,647		217,602,480		218,792,850		217,438,904
Net earnings (loss) per share, basic	$	0.32	$	0.06	$	0.26	$	(0.49)
Diluted:
Net income (loss)	$	71	$	13	$	58	$	(108)
Less: net income attributable to participating rights	(2)		—		(2)		—
Net income (loss) attributable to common stockholders	$	69	$	13	$	56	$	(108)
Weighted-average common shares outstanding, basic	219,402,647		217,602,480		218,792,850		217,438,904
Effect of dilutive potential common shares	1,023,012		1,334,065		1,430,423		—
Weighted-average common shares outstanding, diluted	220,425,659		218,936,545		220,223,273		217,438,904
Net earnings (loss) per share, diluted	$	0.31	$	0.06	$	0.26	$	(0.49)

Revenue Recognition - Operating Revenues by Principal Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 967	$ 909	$ 1,815	$ 1,514
Domestic
Disaggregation of Revenue [Line Items]
Total operating revenues	877	819	1,658	1,365
Latin America
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 90	$ 90	$ 157	$ 149

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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+ Details

Stock-Based Compensation	6 Months Ended
Stock-Based Compensation	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation During the three and six months ended June 30, 2023 and 2022, the Company recognized $3 million, $7 million, $4 million and $7 million, respectively, in stock-based compensation expense, which is included as a component of salaries, wages and benefits within the Company’s condensed consolidated statements of operations. Stock Options and Restricted Awards There were no stock options granted during the six months ended June 30, 2023. During the six months ended June 30, 2023, 2,057,123 vested stock options were exercised with a weighted-average exercise price of $0.32 per share. As of June 30, 2023, the weighted-average exercise price of outstanding options was $2.60 per share. During the six months ended June 30, 2023, 1,507,011 restricted stock units were issued with a weighted-average grant date fair value of $11.86 per share. During the six months ended June 30, 2023, 1,162,274 restricted stock units vested, of which 417,894 restricted stock units were withheld to cover employees’ tax withholding obligations, with a weighted-average grant date fair value of $11.88 and $12.32 per share, respectively. Phantom Equity Awards On December 3, 2013, to give effect to the reorganization of the Company’s corporate structure, an agreement was reached to amend and restate a phantom equity agreement with the Company’s pilots. Under the terms of this agreement, when an amendment to the underlying collective bargaining agreement was approved, the Company’s pilots employed in June 2011 (the “Participating Pilots”), through their agent, FAPAInvest, LLC, received phantom equity units. Each unit represented the right to receive common stock or cash in connection with certain events, including a qualifying initial public offering, such stock to be distributed or cash paid to the Participating Pilots in 2020 and 2022 based on a predetermined formula. In accordance with the amended and restated phantom equity agreement, the obligation became fixed as of December 31, 2019 and was no longer subject to valuation adjustments. As of December 31, 2021, the remaining liability was $26 million and presented within other current liabilities on the Company’s condensed consolidated balance sheet. During the six months ended June 30, 2022, the $26 million was fully paid. Stockholders’ Equity As of June 30, 2023 and December 31, 2022, the Company had authorized common stock (voting), common stock (non-voting) and preferred stock of 750,000,000, 150,000,000 and 10,000,000 shares, respectively, of which only common stock (voting) were issued and outstanding. All classes of equity have a par value of $0.001 per share.

Commitments and Contingencies - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023 aircraft	Jun. 30, 2023 USD ($) aircraft leasingPartner employeeGroup	Jun. 30, 2023 USD ($) aircraft engine leasingPartner employeeGroup	Dec. 31, 2022 USD ($)	Oct. 31, 2019 aircraft
Long-term Purchase Commitment [Line Items]
Purchase obligation, to be paid, remainder of fiscal year \| $		$ 417	$ 417
Purchase obligation, to be paid, year one \| $		1,448	1,448
Purchase obligation, to be paid, year two \| $		2,437	2,437
Purchase obligation, to be paid, year three \| $		2,357	2,357
Purchase obligation, to be paid, year four \| $		2,447	2,447
Purchase obligation, to be paid, after year four \| $		$ 3,757	$ 3,757
Number of union-represented employee groups \| employeeGroup		7	7
Amount of employees represented by unions			86.00%
Accrued liabilities for health care claims \| $		$ 6	$ 6	$ 5
Aircraft Engine
Long-term Purchase Commitment [Line Items]
Number of aircraft agreed to purchase \| engine			17
Air Transportation Equipment
Long-term Purchase Commitment [Line Items]
Number of aircraft agreed to purchase \| aircraft			217
Air Transportation Equipment \| A320neo
Long-term Purchase Commitment [Line Items]
Number of aircraft agreed to purchase \| aircraft			67
Number of aircraft eligible for conversion \| aircraft					18
Air Transportation Equipment \| A321neo
Long-term Purchase Commitment [Line Items]
Number of aircraft agreed to purchase \| aircraft			150
Number of leasing partners with signed letter of intent \| leasingPartner		2	2
Number of aircraft to be added through direct leases \| aircraft			10
Number of aircraft added through direct leases \| aircraft		2	5
Air Transportation Equipment \| A321neo \| Forecast
Long-term Purchase Commitment [Line Items]
Number of aircraft to be added through direct leases \| aircraft	5

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended				6 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Pay vs Performance Disclosure
Net income (loss)	$ 71	$ (13)	$ 13	$ (121)	$ 58	$ (108)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
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Reference 35: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Publisher FASB
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Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
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-Subparagraph (a)
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Reference 37: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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-Section 45
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-Subparagraph (a)
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-URI https://asc.fasb.org//1943274/2147482790/220-10-45-1B

Reference 38: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(20))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

Reference 39: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ Details

Other Current Assets

6 Months Ended

Jun. 30, 2023

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other Current Assets

Other Current AssetsOther current assets consist of the following (in millions):


	June 30, 2023		December 31, 2022
Supplier incentives	$	40	$	55
Prepaid expenses	23		20
Derivative instruments	5		24
Income tax and other taxes receivable	5		8
Other	5		7
Total other current assets	$	78	$	114

Operating Leases - Other Ground Property and Equipment (Details) - Other Ground Property And Equipment	Jun. 30, 2023
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 month
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	9 years

Fair Value Measurements - Fair Value of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other current assets	Other current assets
Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 780,000	$ 761,000
Interest rate derivative contracts	5,000	24,000
Fair Value, Recurring \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	780,000	761,000
Interest rate derivative contracts	0	0
Fair Value, Recurring \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Interest rate derivative contracts	5,000	24,000
Fair Value, Recurring \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Interest rate derivative contracts	$ 0	$ 0

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480524/946-210-50-12

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-10

+ Details

Operating Leases - Aircraft Rent Expense and Maintenance Obligations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Leases [Abstract]
Aircraft rent expense (benefit)	$ 148	$ 133	$ 279	$ 261
Supplemental rent expense for maintenance-related reserves deemed non-recoverable	(2)	(1)	(2)	(1)
Supplemental rent expense related to probable lease return condition obligations	22	$ 18	24	$ 33
Leased aircraft return cost liability	58		58		$ 102
Aircraft maintenance deposits expected to be recoverable	109		109		117
Aircraft maintenance deposits expected to be recoverable, eligible maintenance performed	24		24		12
Aircraft maintenance deposits	85		85		$ 105
Maintenance reserve payments, due remainder of fiscal year	2		2
Maintenance reserve payments, due in year one	3		3
Maintenance reserve payments, due in year two	3		3
Maintenance reserve payments, due in year three	3		3
Maintenance reserve payments, due in year four	4		4
Maintenance reserve payments, due after year four	$ 5		$ 5

Revenue Recognition

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue RecognitionAs of June 30, 2023 and December 31, 2022, the Company’s air traffic liability balance was $356 million and $328 million, respectively, which includes amounts classified in other long-term liabilities. During the six months ended June 30, 2023, 89% of the air traffic liability as of December 31, 2022 was recognized as passenger revenue within the Company’s condensed consolidated statements of operations. Of the air traffic liability balances as of June 30, 2023 and December 31, 2022, $72 million and $60 million, respectively, was related to unearned membership fees.

During the three and six months ended June 30, 2023 and 2022, the Company recognized $10 million, $20 million, $23 million and $45 million, respectively, in passenger revenues within the Company’s condensed consolidated statements of operations, related to expected and actual expiration of customer rights to book future travel.

Operating revenues are comprised of passenger revenues, which includes fare and non-fare passenger revenues, and other revenues. Disaggregated operating revenues are as follows (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Passenger revenues:
Fare	$	361	$	420	$	664	$	649
Non-fare passenger revenues:
Service fees	245		201		462		363
Baggage	232		186		453		316
Seat selection	74		68		146		122
Other	33		15		50		28
Total non-fare passenger revenue	584		470		1,111		829
Total passenger revenues	945		890		1,775		1,478
Other revenues	22		19		40		36
Total operating revenues	$	967	$	909	$	1,815	$	1,514

The Company is managed as a single business unit that provides air transportation for passengers. Operating revenues by principal geographic region, as defined by the U.S. Department of Transportation (the “DOT”), are as follows (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Domestic	$	877	$	819	$	1,658	$	1,365
Latin America	90		90		157		149
Total operating revenues	$	967	$	909	$	1,815	$	1,514

The Company attributes operating revenues by geographic region based upon the origin and destination of each passenger flight segment. The Company’s tangible assets consist primarily of flight equipment, which are mobile across geographic markets. Accordingly, assets are not allocated to specific geographic regions.

Frequent Flyer Program

The Company’s Frontier Miles frequent flyer program provides frequent flyer travel awards to program members based on accumulated mileage credits. Mileage credits are generally accumulated as a result of travel, purchases using the co-branded credit card and purchases from other participating partners. The Company defers revenue for mileage credits earned by passengers under its Frontier Miles program based on the equivalent ticket value a passenger receives by redeeming mileage credits for a ticket rather than paying cash.

The Company has a credit card affinity agreement with its credit card partner, Barclays Bank Delaware (“Barclays”), through 2029, which provides for joint marketing, grants certain benefits to co-branded credit cardholders (“Cardholders”) and allows Barclays to market using the Company’s customer database. Cardholders earn mileage credits under the Frontier Miles program and the Company sells mileage credits at agreed-upon rates to Barclays and earns fees from Barclays for the acquisition, retention and use of the co-branded credit card by Cardholders.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-10

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-15

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Paragraph 12
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org//606/tableOfContent

+ Details

Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Stock-based compensation expense	$ 3	$ 4	$ 7	$ 7

Debt (Tables)

6 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

Schedule of Debt Obligations

The Company’s debt obligations are as follows (in millions):


	June 30, 2023		December 31, 2022
Secured debt:
Pre-delivery credit facility(a)	$	270	$	277
Floating rate building note(b)	17		17
Unsecured debt:
Affinity card advance purchase of mileage credits(c)	80		71
PSP Promissory Notes(d)	66		66
Total debt	433		431
Less current maturities of long-term debt	(237)		(157)
Less debt acquisition costs and other discounts, net	(3)		(2)
Long-term debt, net	$	193	$	272

__________________

Schedule of Maturities of Long-term Debt

As of June 30, 2023, future maturities of debt are payable as follows (in millions):


	June 30, 2023
Remainder of 2023	$	102
2024	163
2025	22
2026	—
2027	—
Thereafter	146
Total debt principal payments	$	433

Net Earnings (Loss) per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Basic:
Net income (loss)	$ 71	$ (13)	$ 13	$ (121)	$ 58	$ (108)
Less: net income attributable to participating rights	(2)		0		(2)	0
Net income (loss) attributable to common stockholders	$ 69		$ 13		$ 56	$ (108)
Weighted average common shares outstanding, basic (in shares)	219,402,647		217,602,480		218,792,850	217,438,904
Net earnings (loss) per share, basic (in dollars per share)	$ 0.32		$ 0.06		$ 0.26	$ (0.49)
Diluted:
Less: net income attributable to participating rights	$ (2)		$ 0		$ (2)	$ 0
Net income (loss) attributable to common stockholders	$ 69		$ 13		$ 56	$ (108)
Effect of dilutive potential common shares (in shares)	1,023,012		1,334,065		1,430,423	0
Weighted average common shares outstanding, diluted (in shares)	220,425,659		218,936,545		220,223,273	217,438,904
Net earnings (loss) per share, diluted (in dollars per share)	$ 0.31		$ 0.06		$ 0.26	$ (0.49)
Shares excluded from the computation of diluted shares (in shares)	2,886,151		2,284,417		2,264,024

Condensed Consolidated Statements of Stockholders’ Equity - USD ($) $ in Millions	Total	Common Stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)
Beginning balance (in shares) at Dec. 31, 2021		217,065,096
Beginning balance at Dec. 31, 2021	$ 530	$ 0	$ 381	$ 159	$ (10)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(121)			(121)
Shares issued in connection with vesting of restricted stock units (in shares)		676,146
Shares withheld to cover employee taxes on vested restricted stock units (in shares)		(275,822)
Shares withheld to cover employee taxes on vested restricted stock units	(3)		(3)
Stock option exercises (in shares)		34,461
Stock-based compensation	3		3
Ending balance (in shares) at Mar. 31, 2022		217,499,881
Ending balance at Mar. 31, 2022	409	$ 0	381	38	(10)
Beginning balance (in shares) at Dec. 31, 2021		217,065,096
Beginning balance at Dec. 31, 2021	530	$ 0	381	159	(10)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(108)
Ending balance (in shares) at Jun. 30, 2022		217,675,437
Ending balance at Jun. 30, 2022	426	$ 0	385	51	(10)
Beginning balance (in shares) at Mar. 31, 2022		217,499,881
Beginning balance at Mar. 31, 2022	409	$ 0	381	38	(10)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13			13
Shares issued in connection with vesting of restricted stock units (in shares)		96,078
Shares withheld to cover employee taxes on vested restricted stock units (in shares)		(10,472)
Amortization of swaption cash flow hedges, net of tax	1				1
Unrealized gain from cash flows hedges, net of tax	(1)				(1)
Stock option exercises (in shares)		89,950
Stock-based compensation	4		4
Ending balance (in shares) at Jun. 30, 2022		217,675,437
Ending balance at Jun. 30, 2022	$ 426	$ 0	385	51	(10)
Beginning balance (in shares) at Dec. 31, 2022	217,875,890	217,875,890
Beginning balance at Dec. 31, 2022	$ 509	$ 0	393	122	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(13)			(13)
Shares issued in connection with vesting of restricted stock units (in shares)		976,916
Shares withheld to cover employee taxes on vested restricted stock units (in shares)		(402,814)
Shares withheld to cover employee taxes on vested restricted stock units	(5)		(5)
Unrealized gain from cash flows hedges, net of tax	(7)				(7)
Stock option exercises (in shares)		53,862
Stock-based compensation	4		4
Ending balance (in shares) at Mar. 31, 2023		218,503,854
Ending balance at Mar. 31, 2023	$ 488	$ 0	392	109	(13)
Beginning balance (in shares) at Dec. 31, 2022	217,875,890	217,875,890
Beginning balance at Dec. 31, 2022	$ 509	$ 0	393	122	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 58
Stock option exercises (in shares)	2,057,123
Ending balance (in shares) at Jun. 30, 2023	220,677,393	220,677,393
Ending balance at Jun. 30, 2023	$ 566	$ 0	396	180	(10)
Beginning balance (in shares) at Mar. 31, 2023		218,503,854
Beginning balance at Mar. 31, 2023	488	$ 0	392	109	(13)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	71			71
Shares issued in connection with vesting of restricted stock units (in shares)		185,358
Shares withheld to cover employee taxes on vested restricted stock units (in shares)		(15,080)
Amortization of swaption cash flow hedges, net of tax	1				1
Unrealized gain from cash flows hedges, net of tax	2				2
Stock option exercises (in shares)		2,003,261
Stock option exercises	1		1
Stock-based compensation	$ 3		3
Ending balance (in shares) at Jun. 30, 2023	220,677,393	220,677,393
Ending balance at Jun. 30, 2023	$ 566	$ 0	$ 396	$ 180	$ (10)

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Unrealized losses from cash flow hedges net of adjustment for de-designation of fuel hedges, tax benefit/(expense)	$ 1	$ 1	$ (1)	$ 1

Operating Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Lessee, Lease, Description [Line Items]
Cash paid for amounts included in measurement of lease liabilities	$ 130	$ 119	$ 257	$ 236
Aircraft and Aircraft Engines
Lessee, Lease, Description [Line Items]
Acquired aircraft and engines through operating leases	$ 107	$ 87	$ 338	$ 148

Net Earnings (Loss) per Share

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Net Earnings (Loss) per Share

Basic and diluted earnings (loss) per share are computed pursuant to the two-class method. Under the two-class method, the Company attributes net income to common stock and other participating rights (including those with vested share-based awards). Basic net earnings per share is calculated by taking net income, less earnings allocated to participating rights, divided by the basic weighted-average common stock outstanding. Net loss per share is calculated by taking net loss divided by basic weighted-average common stock outstanding as participating rights do not share in losses. In accordance with the two-class method, diluted net earnings per share is calculated using the more dilutive impact of the treasury-stock method or from reducing net income for the earnings allocated to participating rights.


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Basic:
Net income (loss)	$	71	$	13	$	58	$	(108)
Less: net income attributable to participating rights	(2)		—		(2)		—
Net income (loss) attributable to common stockholders	$	69	$	13	$	56	$	(108)
Weighted-average common shares outstanding, basic	219,402,647		217,602,480		218,792,850		217,438,904
Net earnings (loss) per share, basic	$	0.32	$	0.06	$	0.26	$	(0.49)
Diluted:
Net income (loss)	$	71	$	13	$	58	$	(108)
Less: net income attributable to participating rights	(2)		—		(2)		—
Net income (loss) attributable to common stockholders	$	69	$	13	$	56	$	(108)
Weighted-average common shares outstanding, basic	219,402,647		217,602,480		218,792,850		217,438,904
Effect of dilutive potential common shares	1,023,012		1,334,065		1,430,423		—
Weighted-average common shares outstanding, diluted	220,425,659		218,936,545		220,223,273		217,438,904
Net earnings (loss) per share, diluted	$	0.31	$	0.06	$	0.26	$	(0.49)

Approximately 2,886,151 and 2,264,024 shares were excluded from the computation of diluted shares for the three and six months ended June 30, 2023, respectively, due to antidilutive effects. Approximately 2,284,417 shares were excluded from the computation of diluted shares for the three months ended June 30, 2022 due to antidilutive effects. Due to the net loss incurred during the six months ended June 30, 2022, diluted weighted-average shares outstanding are equal to basic weighted-average shares outstanding because the effect of all equity awards is anti-dilutive.

Stock-Based Compensation - Phantom Equity Awards (Details) - Phantom Share Units (PSUs) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Current portion of phantom equity units		$ 26
Remaining liability paid	$ 26

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Commitment and Contingencies - Contractual Obligation, Fiscal Year Maturity (Details) $ in Millions	Jun. 30, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2023	$ 417
2024	1,448
2025	2,437
2026	2,357
2027	2,447
Thereafter	3,757
Purchase obligation total	$ 12,863

Financial Derivative Instruments and Risk Management - Net of Tax Impact of the Overall Effectiveness of Derivative Instruments Designated as Cash Flow Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivatives designated as cash flow hedges
Amortization of swaption cash flow hedges, net of tax	$ 1		$ 1
Unrealized gain from cash flows hedges, net of tax	2	$ (7)	(1)
Total	3		0	$ (4)	$ 0
Interest Rate Swap
Derivatives designated as cash flow hedges
Amortization of swaption cash flow hedges, net of tax	1		1	1	1
Unrealized gain from cash flows hedges, net of tax	2		(1)	(5)	(1)
Total	3		0	(4)	0
Interest Rate Swap \| Cash Flow Hedging
Derivatives designated as cash flow hedges
Amortization of cash flow hedges, net of tax	$ (1)		$ (1)	$ (1)	$ (1)

Insider Trading Arrangements - shares	3 Months Ended		6 Months Ended
Insider Trading Arrangements - shares	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023
Trading Arrangements, by Individual
Material Terms of Trading Arrangement			On May 24, 2023, Barry L. Biffle, our President and Chief Executive Officer, terminated two Rule 10b5-1(c) trading arrangements intended to satisfy the affirmative defense of Rule 10b5-1(c) originally adopted on (i) February 16, 2023 for the sale of up to 500,000 shares of our common stock until November 30, 2023 and (ii) May 23, 2022, as amended on December 8, 2022, for the sale of up to 950,000 shares of our common stock until August 31, 2023. On June 9, 2023, Mr. Biffle and Mr. Biffle’s spouse, as trustee for a trust holding shares of our common stock for the benefit of Mr. Biffle’s child (the “Biffle Trust”), adopted a Rule 10b5-1(c) trading arrangement that is intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 2,226,972 shares of our common stock by Mr. Biffle and up to 75,000 shares of our common stock by the Biffle Trust, until February 15, 2024.
Non-Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Terminated	false
Barry L Biffle Trading Arrangement, Common Stock, May 23, 2022 [Member] \| Barry L Biffle [Member]
Trading Arrangements, by Individual
Name	Barry L. Biffle
Title	President and Chief Executive Officer
Adoption Date		May 23, 2022
Rule 10b5-1 Arrangement Terminated	true
Termination Date	May 24, 2023
Aggregate Available	950,000		950,000
Barry L Biffle Trading Arrangement, Common Stock, February 16, 2023 [Member] \| Barry L Biffle [Member]
Trading Arrangements, by Individual
Name	Barry L. Biffle
Title	President and Chief Executive Officer
Adoption Date	February 16, 2023
Rule 10b5-1 Arrangement Terminated	true
Termination Date	May 24, 2023
Aggregate Available	500,000		500,000
Barry L Biffle Trading Arrangement, Common Stock, June 9, 2023 [Member] \| Barry L Biffle [Member]
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	June 9, 2023
Termination Date	February 15, 2024
Aggregate Available	2,226,972		2,226,972
Biffle Trust Shares [Member] \| Mr. Biffle's Spouse [Member]
Trading Arrangements, by Individual
Title	trustee
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	June 9, 2023
Termination Date	February 15, 2024
Arrangement Duration	251 days
Aggregate Available	75,000		75,000
Biffle Trust [Member] \| Barry L Biffle [Member]
Trading Arrangements, by Individual
Arrangement Duration	251 days

Financial Derivative Instruments and Risk Management

6 Months Ended

Jun. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Financial Derivative Instruments and Risk Management

The Company may be exposed to interest rate risk through aircraft and spare engine lease contracts for the time period between agreement of terms and commencement of the lease, when portions of rental payments can be adjusted and become fixed based on the swap rate. As part of its risk management program, the Company enters into contracts in order to limit the exposure to fluctuations in interest rates. During each of the three and six months ended June 30, 2023, the Company did not enter into any swaps and, therefore, paid no upfront premiums. During each of the three and six months ended June 30, 2022, the Company paid upfront premiums of $9 million for the option to enter into and exercise cash-settled swaps with a forward starting effective date for seven of the Company’s future aircraft deliveries. As of June 30, 2023, the Company had hedged the interest rate exposure on $295 million of total aircraft and spare engine rent for seven aircraft and two engines to be delivered by the end of 2023.

Additionally, the Company is exposed to credit losses in the event of nonperformance by counterparties to its derivative instruments but does not presently expect that any of its counterparties will fail to meet their respective obligations. The amount of such credit exposure is generally the fair value of the Company’s outstanding contracts in a receivable position. To manage credit risks, the Company selects counterparties based on credit assessments and monitors the market position with each counterparty.

The assets associated with the Company’s derivative instruments are presented on a gross basis and include upfront premiums paid. These assets are recorded as a component of other current assets on the Company’s condensed consolidated balance sheets. There were $5 million and $24 million of assets outstanding as of June 30, 2023 and December 31, 2022, respectively.

The following table summarizes the effect of interest rate derivative instruments reflected in aircraft rent expense within the Company’s condensed consolidated statements of operations (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Derivatives designated as cash flow hedges
Amortization of cash flow hedges, net of tax	$	(1)	$	(1)	$	(1)	$	(1)

The following table summarizes the net of tax impact of the overall effectiveness of derivative instruments designated as cash flow hedging instruments within the Company’s condensed consolidated statements of comprehensive income (loss) (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Derivatives designated as cash flow hedges
Amortization of cash flow hedges, net of tax	$	1	$	1	$	1	$	1
Interest rate derivative contract gains (losses), net of tax	2		(1)		(5)		(1)
Total	$	3	$	—	$	(4)	$	—

As of June 30, 2023, $10 million of losses, net of tax, related to interest rate hedging instruments included in accumulated other comprehensive income (loss), a component of stockholders’ equity on the Company’s condensed consolidated balance sheets, is expected to be reclassified into aircraft rent within the Company’s condensed consolidated statements of operations over the aircraft or engine lease term.

Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating revenues:
Total operating revenues	$ 967	$ 909	$ 1,815	$ 1,514
Operating expenses:
Aircraft fuel	244	335	536	550
Salaries, wages and benefits	211	174	414	346
Aircraft rent	148	133	279	261
Station operations	124	120	248	225
Sales and marketing	44	46	84	78
Maintenance, materials and repairs	52	31	97	65
Depreciation and amortization	12	15	23	28
Transaction and merger-related costs	0	9	1	20
Other operating	53	39	79	87
Total operating expenses	888	902	1,761	1,660
Operating income (loss)	79	7	54	(146)
Other income (expense):
Interest expense	(7)	(3)	(13)	(12)
Capitalized interest	6	2	12	3
Interest income and other	10	2	18	2
Total other income (expense)	9	1	17	(7)
Income (loss) before income taxes	88	8	71	(153)
Income tax expense (benefit)	17	(5)	13	(45)
Net income (loss)	$ 71	$ 13	$ 58	$ (108)
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.32	$ 0.06	$ 0.26	$ (0.49)
Diluted (in dollars per share)	$ 0.31	$ 0.06	$ 0.26	$ (0.49)
Passenger
Operating revenues:
Total operating revenues	$ 945	$ 890	$ 1,775	$ 1,478
Other
Operating revenues:
Total operating revenues	$ 22	$ 19	$ 40	$ 36

Other Current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Passenger and other taxes and fees payable	$ 128	$ 113
Salaries, wages and benefits	98	104
Aircraft maintenance	58	63
Station obligations	49	57
Fuel liabilities	33	34
Leased aircraft return costs	28	84
Other current liabilities	62	63
Total other current liabilities	$ 456	$ 518

Summary of Significant Accounting Policies (Policies)	6 Months Ended
Summary of Significant Accounting Policies (Policies)	Jun. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of PresentationThe condensed consolidated financial statements have been prepared in accordance with the generally accepted accounting principles in the United States (“GAAP”)
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements have been prepared in accordance with the generally accepted accounting principles in the United States (“GAAP”) and include the accounts of Frontier Group Holdings, Inc. (“FGHI” or the “Company”) and its wholly-owned direct and indirect subsidiaries, including Frontier Airlines Holdings, Inc. (“FAH”) and Frontier Airlines, Inc. (“Frontier”). All wholly-owned subsidiaries are consolidated, with all intercompany transactions and balances being eliminated.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results could differ from those estimates.
Frequent Flyer Program	Frequent Flyer Program The Company’s Frontier Miles frequent flyer program provides frequent flyer travel awards to program members based on accumulated mileage credits. Mileage credits are generally accumulated as a result of travel, purchases using the co-branded credit card and purchases from other participating partners. The Company defers revenue for mileage credits earned by passengers under its Frontier Miles program based on the equivalent ticket value a passenger receives by redeeming mileage credits for a ticket rather than paying cash. The Company has a credit card affinity agreement with its credit card partner, Barclays Bank Delaware (“Barclays”), through 2029, which provides for joint marketing, grants certain benefits to co-branded credit cardholders (“Cardholders”) and allows Barclays to market using the Company’s customer database. Cardholders earn mileage credits under the Frontier Miles program and the Company sells mileage credits at agreed-upon rates to Barclays and earns fees from Barclays for the acquisition, retention and use of the co-branded credit card by Cardholders.
Operating Leases	The Company leases property and equipment under operating leases. For leases with initial terms greater than 12 months, the related operating lease right-of-use asset and corresponding operating lease liability are recorded at the present value of lease payments over the term on the Company’s condensed consolidated balance sheets. Some leases include rental escalation clauses, renewal options, termination options and/or other items that cause variability that are factored into the determination of lease payments, when appropriate. The Company does not separate lease and non-lease components of contracts, except for certain flight training equipment, for which consideration is allocated between lease and non-lease components.
Fair Value Measurement	Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company utilizes several valuation techniques in order to assess the fair value of its financial assets and liabilities. Cash, Cash Equivalents and Restricted Cash Cash, cash equivalents and restricted cash are comprised of liquid money market funds, time deposits and cash, and are categorized as Level 1 instruments. The Company maintains cash with various high-quality financial institutions and holds restricted cash to secure medical claims paid. Cash, cash equivalents and restricted cash are carried at cost, which management believes approximates fair value. As of June 30, 2023 and December 31, 2022, the Company had less than $1 million of restricted cash. Interest Rate Derivative Contracts Interest rate derivative contracts are valued under an income approach based on data either readily observable in public markets, derived from public markets or provided by counterparties who regularly trade in public markets and, therefore, they are classified as Level 2 inputs. Given the swaptions will be cash-settled upon exercise and that the market value will be determined using overnight indexed swap (“OIS”) discounting, OIS discounting is applied to the income approach valuation. Debt The estimated fair value of the Company’s debt agreements has been determined to be Level 3 measurement, as certain inputs used to determine the fair value of these agreements are unobservable. The Company utilizes a discounted cash flow method to estimate the fair value of the Level 3 debt.

- Definition

Disclosure of accounting policy for revenue from contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 19
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-19

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-18

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-18

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-20

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-20

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-20

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-20

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (e)
-SubTopic 10
-Topic 235
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483426/235-10-50-4

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org//606/tableOfContent

+ Details

Operating Leases - Lease Extension (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Lessee, Lease, Description [Line Items]
Aircraft rent expense (benefit)	$ 148	$ 133	$ 279	$ 261
Aircraft
Lessee, Lease, Description [Line Items]
Aircraft rent expense (benefit)			$ (18)

Other Current Assets (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Supplier incentives	$ 40	$ 55
Prepaid expenses	23	20
Derivative instruments	5	24
Income tax and other taxes receivable	5	8
Other	5	7
Total other current assets	$ 78	$ 114

Financial Derivative Instruments and Risk Management - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) aircraft	Jun. 30, 2022 USD ($) aircraft	Jun. 30, 2023 USD ($) aircraft	Jun. 30, 2022 USD ($) aircraft	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Future engine deliveries with option to enter into and exercise cash settled swaps \| aircraft	2		2
Interest Rate Swap
Derivative [Line Items]
Cost of swap		$ 9,000,000		$ 9,000,000
Future aircraft deliveries with option to enter into and exercise cash settled swaps \| aircraft	7	7	7	7
Notional amount	$ 295,000,000		$ 295,000,000
Unrealized losses from cash flow hedges net of adjustment for dedesignation of fuel hedges, net of deferred tax benefit			10,000,000
Interest Rate Swap \| Other Noncurrent Assets
Derivative [Line Items]
Derivative, other current assets	5,000,000		5,000,000		$ 24,000,000
Fuel
Derivative [Line Items]
Cost of swap	$ 0		$ 0

Operating Leases (Tables)

6 Months Ended

Jun. 30, 2023

Leases [Abstract]

Schedule of Lease Costs

The table below presents certain information related to lease costs for operating leases during the three and six months ended June 30, 2023 and 2022 (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Operating lease cost(a)	$	131	$	118	$	258	$	235
Variable lease cost(a)	70		64		144		119
Total lease costs	$	201	$	182	$	402	$	354

______________

(a) Expenses are included within aircraft rent, station operations, maintenance, materials and repairs and other operating within the Company’s condensed consolidated statements of operations.

Fair Value Measurements - Carrying Amounts and Estimated Fair Values of the Company’s Debt (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	$ 433	$ 431
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	421	412
PDP Financing Facility \| Carrying Value \| Secured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	270	277
PDP Financing Facility \| Estimated Fair Value \| Secured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	272	277
Floating rate building note \| Carrying Value \| Secured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	17	17
Floating rate building note \| Estimated Fair Value \| Secured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	17	17
Affinity card advance purchase of mileage credits \| Carrying Value \| Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	80	71
Affinity card advance purchase of mileage credits \| Estimated Fair Value \| Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	77	66
PSP Promissory Notes \| Carrying Value \| Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	66	66
PSP Promissory Notes \| Estimated Fair Value \| Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	$ 55	$ 52

Financial Derivative Instruments and Risk Management (Tables)

6 Months Ended

Jun. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Derivatives designated as cash flow hedges
Amortization of cash flow hedges, net of tax	$	(1)	$	(1)	$	(1)	$	(1)


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Derivatives designated as cash flow hedges
Amortization of cash flow hedges, net of tax	$	1	$	1	$	1	$	1
Interest rate derivative contract gains (losses), net of tax	2		(1)		(5)		(1)
Total	$	3	$	—	$	(4)	$	—

Summary of Significant Accounting Policies - Basis of Presentation (Details)	6 Months Ended
	Jun. 30, 2023 airport reportableSegment
Accounting Policies [Abstract]
Number of airports served \| airport	90
Number of reportable segments \| reportableSegment	1

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 780	$ 761
Accounts receivable, net	91	90
Supplies, net	60	55
Other current assets	78	114
Total current assets	1,009	1,020
Property and equipment, net	260	226
Operating lease right-of-use assets	2,638	2,484
Pre-delivery deposits for flight equipment	380	371
Aircraft maintenance deposits	85	105
Intangible assets, net	28	28
Other assets	308	265
Total assets	4,708	4,499
Liabilities and stockholders’ equity
Accounts payable	91	89
Air traffic liability	353	313
Frequent flyer liability	11	13
Current maturities of long-term debt, net	237	157
Current maturities of operating leases	497	465
Other current liabilities	456	518
Total current liabilities	1,645	1,555
Long-term debt, net	193	272
Long-term operating leases	2,157	2,034
Long-term frequent flyer liability	32	32
Other long-term liabilities	115	97
Total liabilities	4,142	3,990
Commitments and contingencies
Stockholders' equity
Common stock, $0.001 par value per share, with 220,677,393 and 217,875,890 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively	0	0
Additional paid-in capital	396	393
Retained earnings	180	122
Accumulated other comprehensive income (loss)	(10)	(6)
Total stockholders’ equity	566	509
Total liabilities and stockholders’ equity	$ 4,708	$ 4,499

Other Current Liabilities

6 Months Ended

Jun. 30, 2023

Other Liabilities Disclosure [Abstract]

Other Current Liabilities

Other Current LiabilitiesOther current liabilities consist of the following (in millions):


	June 30, 2023		December 31, 2022
Passenger and other taxes and fees payable	$	128	$	113
Salaries, wages and benefits	98		104
Aircraft maintenance	58		63
Station obligations	49		57
Fuel liabilities	33		34
Leased aircraft return costs	28		84
Other current liabilities	62		63
Total other current liabilities	$	456	$	518

Operating Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Leases [Abstract]
Operating lease cost	$ 131	$ 118	$ 258	$ 235
Variable lease cost	70	64	144	119
Total lease costs	$ 201	$ 182	$ 402	$ 354

Commitments and Contingencies - Aircraft and Engine Orders (Details)	6 Months Ended
	Jun. 30, 2023 aircraft engine
Air Transportation Equipment
Long-term Purchase Commitment [Line Items]
Remainder of 2023	7
2024	24
2025	41
2026	41
2027	42
Thereafter	62
Total	217
Aircraft Engine
Long-term Purchase Commitment [Line Items]
Remainder of 2023 \| engine	2
2024 \| engine	2
2025 \| engine	4
2026 \| engine	4
2027 \| engine	3
Thereafter \| engine	2
Total \| engine	17
A320neo \| Air Transportation Equipment
Long-term Purchase Commitment [Line Items]
Remainder of 2023	0
2024	0
2025	17
2026	19
2027	21
Thereafter	10
Total	67
A321neo \| Air Transportation Equipment
Long-term Purchase Commitment [Line Items]
Remainder of 2023	7
2024	24
2025	24
2026	22
2027	21
Thereafter	52
Total	150

The Proposed Merger with Spirit Airlines, Inc. ("Spirit") (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Business Acquisition [Line Items]
Transaction and merger-related costs	$ 0	$ 9	$ 1	$ 20
Spirit Airlines, Inc Merger
Business Acquisition [Line Items]
Transaction and merger-related costs	1	9	1	20
Termination fee	$ 69		$ 69
Spirit Airlines, Inc Merger \| Retention Bonus
Business Acquisition [Line Items]
Transaction and merger-related costs		5		8
Spirit Airlines, Inc Merger \| Legal, Accounting and Other Fees
Business Acquisition [Line Items]
Transaction and merger-related costs		$ 4		$ 12

Related Parties	6 Months Ended
Related Parties	Jun. 30, 2023
Related Party Transactions [Abstract]
Related Parties	Related Parties Management Services Indigo Partners LLC (“Indigo Partners”) manages an investment fund that is the controlling stockholder of the Company. The Company is assessed a quarterly fee by Indigo Partners for management services. The Company recorded $1 million for each of the three and six months ended June 30, 2023 and 2022 for these fees, which are included as other operating expenses within the Company’s condensed consolidated statements of operations. Codeshare Arrangement The Company entered into a codeshare agreement with Controladora Vuela Compañía de Aviación, S.A.B. de C.V. (an airline based in Mexico doing business as “Volaris”) during 2018, under which sales began in July 2018. Two of the Company’s directors are members of the board of directors of Volaris and one is an alternate director. As of June 30, 2023, Indigo Partners holds approximately 18% of the total outstanding common stock of Volaris. In August 2018, the Company and Volaris began operating scheduled codeshare flights. The codeshare agreement provides for codeshare fees and revenue sharing for the codeshare flights. Each party bears its own costs and expenses of performance under the agreement, is required to indemnify the other party for certain claims and losses arising out of or related to the agreement and is responsible for complying with certain marketing and product display guidelines. The codeshare agreement also establishes a joint management committee, which includes representatives from both parties and generally oversees the management of the transactions and relationships contemplated by the agreement. The codeshare agreement is subject to automatic renewals and may be terminated by either party at any time upon the satisfaction of certain conditions.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-6

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481062/946-235-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481062/946-235-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(e))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//850/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-6

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-1

+ Details

Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Restricted cash (less than)	$ 1	$ 1

Operating Leases - Aircraft (Details) $ in Millions	3 Months Ended		6 Months Ended
Operating Leases - Aircraft (Details) $ in Millions	Jun. 30, 2023 USD ($) aircraft engine	Jun. 30, 2022 USD ($) aircraft	Jun. 30, 2023 USD ($) aircraft engine	Jun. 30, 2022 USD ($) aircraft
Lessee, Lease, Description [Line Items]
Gains recognized on sale-leaseback transactions \| $			$ 57	$ 28
Aircraft
Lessee, Lease, Description [Line Items]
Number of leases	126		126
Aircraft \| Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 month		1 month
Aircraft \| Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	12 years		12 years
Aircraft Engine
Lessee, Lease, Description [Line Items]
Number of leases \| engine	32		32
Number of engines dependent on usage-based metrics \| engine			13
Aircraft Engine \| Aircraft Sale Leaseback
Lessee, Lease, Description [Line Items]
Number of sale-leaseback transactions	1	2	2	2
Aircraft Engine \| Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 month		1 month
Aircraft Engine \| Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	12 years		12 years
Aircraft and Aircraft Engines
Lessee, Lease, Description [Line Items]
Gains recognized on sale-leaseback transactions \| $	$ 17	$ 21	$ 57	$ 28
A320neo
Lessee, Lease, Description [Line Items]
Number of leases in period	2		5
A320neo \| Aircraft \| Aircraft Sale Leaseback
Lessee, Lease, Description [Line Items]
Number of sale-leaseback transactions	1	3	4	5

Other Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2023

Other Liabilities Disclosure [Abstract]

Schedule of Other Current Liabilities

Other current liabilities consist of the following (in millions):


	June 30, 2023		December 31, 2022
Passenger and other taxes and fees payable	$	128	$	113
Salaries, wages and benefits	98		104
Aircraft maintenance	58		63
Station obligations	49		57
Fuel liabilities	33		34
Leased aircraft return costs	28		84
Other current liabilities	62		63
Total other current liabilities	$	456	$	518

Debt - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Debt Disclosure [Abstract]
Interest paid	$ 12	$ 5

Operating Leases

6 Months Ended

Jun. 30, 2023

Leases [Abstract]

Operating Leases

The Company leases property and equipment under operating leases. For leases with initial terms greater than 12 months, the related operating lease right-of-use asset and corresponding operating lease liability are recorded at the present value of lease payments over the term on the Company’s condensed consolidated balance sheets. Some leases include rental escalation clauses, renewal options, termination options and/or other items that cause variability that are factored into the determination of lease payments, when appropriate. The Company does not separate lease and non-lease components of contracts, except for certain flight training equipment, for which consideration is allocated between lease and non-lease components.

Aircraft

As of June 30, 2023, the Company leased 126 aircraft with remaining terms ranging from one month to 12 years, all of which are under operating leases and are included within operating lease right-of-use assets and operating lease liabilities on the Company’s condensed consolidated balance sheets. In addition, as of June 30, 2023, the Company leased 32 spare engines which are all under operating leases, with the remaining term ranging from one month to 12 years. As of June 30, 2023, the lease rates for 13 of the engines depend on usage-based metrics which are variable and, as such, these leases are not recorded on the Company’s condensed consolidated balance sheets as operating lease right-of-use assets or as operating lease liabilities.

During the three and six months ended June 30, 2023 and 2022, the Company executed sale-leaseback transactions with third-party lessors for one, four, three and five new Airbus A320neo family aircraft, respectively, and also entered into direct leases for two and five new Airbus A320neo family aircraft during the three and six months ended June 30, 2023, respectively. The Company did not enter into any direct leases during the three and six months ended June 30, 2022. Additionally, the Company completed sale-leaseback transactions for one and two engines during the three and six months ended June 30, 2023, respectively, and two engines for each of the three and six months ended June 30, 2022. All of the leases from the sale-leaseback transactions are accounted for as operating leases. The Company recognized net sale-leaseback gains from those sale-leaseback transactions of $17 million, $57 million, $21 million and $28 million during the three and six months ended June 30, 2023 and 2022, respectively, which are included as a component of other operating expenses within the Company’s condensed consolidated statements of operations.

Aircraft Rent Expense and Maintenance Obligations

During the three and six months ended June 30, 2023 and 2022, aircraft rent expense was $148 million, $279 million, $133 million and $261 million respectively. Aircraft rent expense includes supplemental rent, which is made up of maintenance reserves paid or to be paid that are not probable of being reimbursed and probable lease return condition obligations. Supplemental rent expense (benefit) for maintenance-related reserves that were deemed non-recoverable, and any impact from changes in those estimates, was ($2 million) for each of the three and six months ended June 30, 2023 and ($1 million) for each of the three and six months ended June 30, 2022. The portion of supplemental rent expense related to probable lease return condition obligations was $22 million, $24 million, $18 million and $33 million for the three and six months ended June 30, 2023 and 2022, respectively. As of June 30, 2023 and December 31, 2022, the Company’s total leased aircraft return cost liability was $58 million and $102 million, respectively, which are reflected in other current liabilities and other long-term liabilities within the Company’s condensed consolidated balance sheets.

Additionally, certain of the Company’s aircraft lease agreements require the Company to pay maintenance reserves to aircraft lessors to be held as collateral in advance of the Company’s required performance of major maintenance activities. As of June 30, 2023 and December 31, 2022, the Company had aircraft maintenance deposits that are expected to be recoverable of $109 million and $117 million, respectively, on the Company’s condensed consolidated balance sheets, of which $24 million and $12 million, respectively, are included in accounts receivable, net on the Company’s condensed consolidated balance sheets as the eligible maintenance has been performed. The remaining $85 million and $105 million are included within aircraft maintenance deposits on the Company’s condensed consolidated balance sheets as of June 30, 2023 and December 31, 2022, respectively.

A majority of these maintenance reserve payments are calculated based on a utilization measure, such as flight hours or cycles. Maintenance reserves collateralize the lessor for maintenance time run off the aircraft until the completion of the maintenance of the aircraft. As of June 30, 2023, fixed maintenance reserve payments for aircraft and spare engines, including estimated amounts for contractual price escalations, were expected to be $2 million for the remainder of 2023, $3 million per year for 2024 through 2026, $4 million for 2027 and $5 million thereafter, before consideration of reimbursements.

During the six months ended June 30, 2023, the Company extended the term for certain aircraft operating leases that were slated to expire in the fourth quarter of 2023. For the six months ended June 30, 2023, the Company recorded an $18 million benefit to aircraft rent in the Company’s condensed consolidated statement of operations related to previously accrued lease return costs that were variable in nature and associated with the anticipated utilization and condition of the airframes and engines at original return date. Given the extension of these aircraft operating leases, such variable return costs are no longer probable of occurring.

Airport Facilities

The Company’s facility leases are primarily for space at approximately 90 airports that are primarily located in the United States. These leases are classified as operating leases and reflect the use of airport terminals, ticket counters, office space and maintenance facilities. Generally, this space is leased from government agencies that control the use of the airport. The majority of these leases are short-term in nature and renew on an evergreen basis. For these leases, the contractual term is used as the lease term. As of June 30, 2023, the remaining lease terms vary from one month to 12 years. At the majority of the U.S. airports, the lease rates depend on airport operating costs or use of the facilities and are reset at least annually, and because of the variable nature of the rates, these leases are not recorded on the Company’s condensed consolidated balance sheets as right-of-use assets and lease liabilities.

Other Ground Property and Equipment

The Company leases certain other assets such as flight training equipment, building space and various other equipment. Certain of the Company’s leases for other assets are deemed to contain fixed rental payments and, as such, are classified as operating leases and are recorded on the Company’s condensed consolidated balance sheets as a right-of-use asset and liability. The remaining lease terms ranged from one month to nine years as of June 30, 2023.

Lease Costs

The table below presents certain information related to lease costs for operating leases during the three and six months ended June 30, 2023 and 2022 (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Operating lease cost(a)	$	131	$	118	$	258	$	235
Variable lease cost(a)	70		64		144		119
Total lease costs	$	201	$	182	$	402	$	354

______________

(a) Expenses are included within aircraft rent, station operations, maintenance, materials and repairs and other operating within the Company’s condensed consolidated statements of operations.

During the three and six months ended June 30, 2023 and 2022, the Company acquired, through new or modified operating leases, operating lease assets totaling $107 million, $338 million, $87 million and $148 million, respectively, which are included in operating lease right-of-use assets on the Company’s condensed consolidated balance sheets. During the three and six months ended June 30, 2023 and 2022, the Company paid cash of $130 million, $257 million, $119 million and $236 million, respectively, for amounts included in the measurement of lease liabilities.

Debt - Schedule of Maturity (Details) $ in Millions	Jun. 30, 2023 USD ($)
Debt Disclosure [Abstract]
Remainder of 2023	$ 102
2024	163
2025	22
2026	0
2027	0
Thereafter	146
Total debt principal payments	$ 433

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details

Revenue Recognition - Disaggregated Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 967	$ 909	$ 1,815	$ 1,514
Total passenger revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	945	890	1,775	1,478
Fare
Disaggregation of Revenue [Line Items]
Total operating revenues	361	420	664	649
Total non-fare passenger revenue
Disaggregation of Revenue [Line Items]
Total operating revenues	584	470	1,111	829
Service fees
Disaggregation of Revenue [Line Items]
Total operating revenues	245	201	462	363
Baggage
Disaggregation of Revenue [Line Items]
Total operating revenues	232	186	453	316
Seat selection
Disaggregation of Revenue [Line Items]
Total operating revenues	74	68	146	122
Other
Disaggregation of Revenue [Line Items]
Total operating revenues	33	15	50	28
Other revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 22	$ 19	$ 40	$ 36

Summary of Significant Accounting Policies	6 Months Ended
Summary of Significant Accounting Policies	Jun. 30, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The condensed consolidated financial statements have been prepared in accordance with the generally accepted accounting principles in the United States (“GAAP”) and include the accounts of Frontier Group Holdings, Inc. (“FGHI” or the “Company”) and its wholly-owned direct and indirect subsidiaries, including Frontier Airlines Holdings, Inc. (“FAH”) and Frontier Airlines, Inc. (“Frontier”). All wholly-owned subsidiaries are consolidated, with all intercompany transactions and balances being eliminated. The Company is an ultra low-cost, low-fare airline headquartered in Denver, Colorado that offers flights throughout the United States and to select international destinations in the Americas, serving approximately 90 airports. The Company is managed as a single business unit that provides air transportation for passengers. Management has concluded there is only one reportable segment. The accompanying condensed consolidated financial statements include the accounts of the Company and reflect all normal recurring adjustments which management believes are necessary to fairly present the financial position, results of operations and cash flows of the Company for the respective periods presented. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for Form 10-Q. These unaudited interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements of the Company and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, which was filed with the SEC on February 22, 2023 (the “2022 Annual Report”). The interim results reflected in the unaudited condensed consolidated financial statements are not necessarily indicative of the results that may be expected for other interim periods or for the full year. The air transportation business is subject to significant seasonal fluctuations and is volatile and highly affected by economic cycles and trends. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results could differ from those estimates.

The Proposed Merger with Spirit Airlines, Inc. (“Spirit”)	6 Months Ended
	Jun. 30, 2023
Business Combination and Asset Acquisition [Abstract]
The Proposed Merger with Spirit Airlines, Inc. (“Spirit”)	The Proposed Merger with Spirit Airlines, Inc. (“Spirit”) On February 5, 2022, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Top Gun Acquisition Corp. (“Merger Sub”), a direct wholly-owned subsidiary of the Company, and Spirit. The Merger Agreement provided that, among other things, the Merger Sub would be merged with and into Spirit (the “Merger”), with Spirit surviving the Merger and continuing as a wholly-owned subsidiary of the Company. On July 27, 2022, the Company and Spirit mutually terminated the Merger Agreement. The Company recorded less than $1 million and $1 million in expenses related to the proposed Merger within transaction and merger-related costs in the Company’s condensed consolidated statement of operations, during the three and six months ended June 30, 2023, respectively, which represented merger-related retention bonus expense for all eligible employees who were subject to CARES Act compensation restrictions. During the three and six months ended June 30, 2022, the Company recorded $9 million and $20 million, respectively, of expenses related to the proposed Merger within transaction and merger-related costs in the Company’s condensed consolidated statement of operations. These costs included $4 million and $12 million, respectively, related to transaction costs, which include banking, legal and accounting fees, among others, charged in connection with the Merger, and $5 million and $8 million, respectively, of retention bonus expenses. In the event that Spirit, within twelve months following the termination of the Merger Agreement, consummates an acquisition with another acquiror or enters into a definitive written agreement providing for an acquisition with another acquiror, which is ultimately consummated, the Company will be owed an additional $69 million, as provided for in the Merger Agreement.

Revenue Recognition - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Capitalized Contract Cost [Line Items]
Air traffic liability balance	$ 356,000		$ 356,000		$ 328,000
Air traffic liability recognized as passenger revenue			89.00%
Unearned travel club revenue	72,000		$ 72,000		$ 60,000
Passenger revenue recognized	$ 10,000	$ 23,000	$ 20,000	$ 45,000

Related Parties (Details) $ in Millions	3 Months Ended		6 Months Ended
Related Parties (Details) $ in Millions	Jun. 30, 2023 USD ($) aircraft	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) aircraft	Jun. 30, 2022 USD ($)
Related Party Transaction [Line Items]
Management fees, expense reimbursements, and director compensation (less than) \| $	$ 1	$ 1	$ 1	$ 1
Related Party \| Controladora Vuela Compañía de Aviación, S.A.B. de C.V. \| Indigo Partners
Related Party Transaction [Line Items]
Outstanding shares of common stock held (as a percentage)	18.00%		18.00%
Controladora Vuela Compañía de Aviación, S.A.B. de C.V. \| Related Party
Related Party Transaction [Line Items]
Number of company directors	2		2
Number of alternate company directors	1		1

Fair Value Measurements

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

Under ASC 820, Fair Value Measurements and Disclosures, disclosures relating to how fair value is determined for assets and liabilities are required, and a hierarchy for which these assets and liabilities must be grouped is established, based on significant levels of inputs, as follows:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company utilizes several valuation techniques in order to assess the fair value of its financial assets and liabilities.

Cash, Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash are comprised of liquid money market funds, time deposits and cash, and are categorized as Level 1 instruments. The Company maintains cash with various high-quality financial institutions and holds restricted cash to secure medical claims paid. Cash, cash equivalents and restricted cash are carried at cost, which management believes approximates fair value. As of June 30, 2023 and December 31, 2022, the Company had less than $1 million of restricted cash.

Interest Rate Derivative Contracts

Interest rate derivative contracts are valued under an income approach based on data either readily observable in public markets, derived from public markets or provided by counterparties who regularly trade in public markets and, therefore, they are classified as Level 2 inputs. Given the swaptions will be cash-settled upon exercise and that the market value will be determined using overnight indexed swap (“OIS”) discounting, OIS discounting is applied to the income approach valuation.

Debt

The estimated fair value of the Company’s debt agreements has been determined to be Level 3 measurement, as certain inputs used to determine the fair value of these agreements are unobservable. The Company utilizes a discounted cash flow method to estimate the fair value of the Level 3 debt.

The carrying amounts and estimated fair values of the Company’s debt are as follows (in millions):


	June 30, 2023				December 31, 2022
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Secured debt:
PDP Financing Facility	$	270	$	272	$	277	$	277
Floating rate building note	17		17		17		17
Unsecured debt:
Affinity card advance purchase of mileage credits	80		77		71		66
PSP Promissory Notes	66		55		66		52
Total debt	$	433	$	421	$	431	$	412

The tables below present disclosures about the fair value of assets and liabilities measured at fair value on a recurring basis on the Company’s condensed consolidated balance sheets (in millions):


		Fair Value Measurements as of June 30, 2023
Description	Balance Sheet Classification	Total		Level 1		Level 2		Level 3
Cash and cash equivalents	Cash and cash equivalents	$	780	$	780	$	—	$	—
Interest rate derivative contracts	Other current assets	$	5	$	—	$	5	$	—


		Fair Value Measurements as of December 31, 2022
Description	Balance Sheet Classification	Total		Level 1		Level 2		Level 3
Cash and cash equivalents	Cash and cash equivalents	$	761	$	761	$	—	$	—
Interest rate derivative contracts	Other current assets	$	24	$	—	$	24	$	—

The Company had no transfers of assets or liabilities between fair value hierarchy levels between December 31, 2022 and June 30, 2023.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Other Current Assets (Tables)

6 Months Ended

Jun. 30, 2023

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Other Current Assets

Other current assets consist of the following (in millions):


	June 30, 2023		December 31, 2022
Supplier incentives	$	40	$	55
Prepaid expenses	23		20
Derivative instruments	5		24
Income tax and other taxes receivable	5		8
Other	5		7
Total other current assets	$	78	$	114

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 71	$ 13	$ 58	$ (108)
Other comprehensive loss
Unrealized gains (losses) and amortization from cash flow hedges, net of deferred tax benefit/(expense) of $(1) and $1, respectively, for the three and six months ended June 30, 2023 and less than $1 for each of the three and six months ended June 30, 2022. (Note 4)	3	0	(4)	0
Other comprehensive income (loss)	3	0	(4)	0
Comprehensive income (loss)	$ 74	$ 13	$ 54	$ (108)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Disaggregated operating revenues are as follows (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Passenger revenues:
Fare	$	361	$	420	$	664	$	649
Non-fare passenger revenues:
Service fees	245		201		462		363
Baggage	232		186		453		316
Seat selection	74		68		146		122
Other	33		15		50		28
Total non-fare passenger revenue	584		470		1,111		829
Total passenger revenues	945		890		1,775		1,478
Other revenues	22		19		40		36
Total operating revenues	$	967	$	909	$	1,815	$	1,514

Revenue by Geographic Region

Operating revenues by principal geographic region, as defined by the U.S. Department of Transportation (the “DOT”), are as follows (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Domestic	$	877	$	819	$	1,658	$	1,365
Latin America	90		90		157		149
Total operating revenues	$	967	$	909	$	1,815	$	1,514

Cover - shares	6 Months Ended
Cover - shares	Jun. 30, 2023	Jul. 28, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	001-40304
Entity Registrant Name	Frontier Group Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-3681866
Entity Address, Address Line One	4545 Airport Way
Entity Address, City or Town	Denver
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80239
City Area Code	720
Local Phone Number	374-4490
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	ULCC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		220,679,262
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001670076
Current Fiscal Year End Date	--12-31

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Common stock, stated par (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued (in shares)	220,677,393	217,875,890
Common stock outstanding (in shares)	220,677,393	217,875,890

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments

The carrying amounts and estimated fair values of the Company’s debt are as follows (in millions):


	June 30, 2023				December 31, 2022
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Secured debt:
PDP Financing Facility	$	270	$	272	$	277	$	277
Floating rate building note	17		17		17		17
Unsecured debt:
Affinity card advance purchase of mileage credits	80		77		71		66
PSP Promissory Notes	66		55		66		52
Total debt	$	433	$	421	$	431	$	412

Schedule of Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The tables below present disclosures about the fair value of assets and liabilities measured at fair value on a recurring basis on the Company’s condensed consolidated balance sheets (in millions):


		Fair Value Measurements as of June 30, 2023
Description	Balance Sheet Classification	Total		Level 1		Level 2		Level 3
Cash and cash equivalents	Cash and cash equivalents	$	780	$	780	$	—	$	—
Interest rate derivative contracts	Other current assets	$	5	$	—	$	5	$	—


		Fair Value Measurements as of December 31, 2022
Description	Balance Sheet Classification	Total		Level 1		Level 2		Level 3
Cash and cash equivalents	Cash and cash equivalents	$	761	$	761	$	—	$	—
Interest rate derivative contracts	Other current assets	$	24	$	—	$	24	$	—

Operating Leases - Airport Facilities (Details)	6 Months Ended
Operating Leases - Airport Facilities (Details)	Jun. 30, 2023 airport
Lessee, Lease, Description [Line Items]
Number of airports served	90
Minimum \| Airport Facility
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 month
Maximum \| Airport Facility
Lessee, Lease, Description [Line Items]
Remaining lease terms	12 years

Stock-Based Compensation - Stock Options and Restricted Awards (Details)	6 Months Ended
	Jun. 30, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares) \| shares	0
Stock option exercise (in shares) \| shares	(2,057,123)
Weighted average stock price (in dollars per share) \| $ / shares	$ 0.32
Weighted average exercise price of outstanding options (in dollars per share) \| $ / shares	$ 2.60
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued (in shares) \| shares	1,507,011
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 11.86
Vested (in shares) \| shares	(1,162,274)
Shares withheld to cover employee taxes on vested restricted stock units (in shares) \| shares	(417,894)
Weighted average grant date fair value, for vested shares (in dollars per share) \| $ / shares	$ 11.88
Weighted average grant date fair value, withheld to cover employee taxes (in dollars per share) \| $ / shares	$ 12.32

Commitments and Contingencies

6 Months Ended

Jun. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Flight Equipment Commitments

As of June 30, 2023, the Company’s firm aircraft and engine purchase orders consisted of the following:


	A320neo	A321neo	Total Aircraft(a)	Engines
Year Ending
Remainder of 2023	—	7	7	2
2024	—	24	24	2
2025	17	24	41	4
2026	19	22	41	4
2027	21	21	42	3
Thereafter	10	52	62	2
Total	67	150	217	17

__________________

The Company is party to certain aircraft purchase agreements with Airbus (as amended from time to time, the “Airbus Purchase Agreements”) pursuant to which, as of June 30, 2023, the Company had commitments to purchase an aggregate of 67 A320neo and 150 A321neo aircraft, with deliveries expected through 2029 per the latest delivery schedule. The Company has the option to convert 18 A320neo family aircraft to A321XLR family aircraft under certain terms and conditions. Since the option has not been exercised, this conversion right is not reflected in the table above.

The Airbus Purchase Agreements also provide for, among other things, varying purchase incentives for each aircraft type (e.g., A320neo versus A321neo), which are allocated proportionally by aircraft type over the remaining aircraft to be delivered so that each aircraft’s capitalized cost upon induction would be equal. Therefore, as cash paid for deliveries is greater than the capitalized cost due to the allocation of these purchase incentives, a deferred purchase incentive is recognized within other assets on the Company’s condensed consolidated balance sheets, which will ultimately be offset by future deliveries of aircraft with lower cash payments than their associated capitalized cost.

In April 2022, the Company’s agreement with Pratt & Whitney, the provider of engines for certain of the Company’s undelivered aircraft order book, was amended to include additional spare engine commitments and adjust the timing of remaining deliveries, which has been reflected in the table above.

As of June 30, 2023, purchase commitments for these aircraft and engines, including estimated amounts for contractual price escalations and PDPs, consisted of the following:


(in millions)	Total
Remainder of 2023	$	417
2024	1,448
2025	2,437
2026	2,357
2027	2,447
Thereafter	3,757
Total	$	12,863

As of June 30, 2023, the Company had signed lease agreements with two of its leasing partners to add ten additional A321neo aircraft through direct leases. Five of the aircraft have been delivered, with two such direct lease deliveries having occurred in the second quarter of 2023, and the remaining five continuing into the third quarter of 2023, based on the latest delivery schedule. None of these five undelivered aircraft are reflected in the table above given these are not purchase orders.

Litigation and Other Contingencies

The Company is subject to commercial litigation claims and to administrative and regulatory proceedings and reviews that may be asserted or maintained from time to time. The Company regularly evaluates the status of such matters to assess whether a loss is probable and reasonably estimable in determining whether an accrual is appropriate. Furthermore, in determining whether disclosure is appropriate, the Company evaluates each matter to assess if there is at least a reasonable possibility that a loss or additional losses may have been incurred and whether an estimate of possible loss or range of loss can be made. The Company believes the ultimate outcome of such lawsuits, proceedings and reviews will not, individually or in the aggregate, have a material adverse effect on its condensed consolidated financial position, liquidity or results of operations and that the Company’s current accruals cover matters where loss is deemed probable and can be reasonably estimated.

The ultimate outcome of legal actions is unpredictable and can be subject to significant uncertainties, and it is difficult to determine whether any loss is probable or even possible. Additionally, it is also difficult to estimate the amount of loss and there may be matters for which a loss is probable or reasonably possible but not currently estimable. Thus, actual losses may be in excess of any recorded liability or the range of reasonably possible loss.

Employees

The Company has seven union-represented employee groups that together represented approximately 86% of all employees as of June 30, 2023. The table below sets forth the Company’s employee groups and status of the collective bargaining agreements as of June 30, 2023:

Percentage of Workforce

Employee Group

Representative

Amendable Date(a)

June 30, 2023

Pilots

Air Line Pilots Association (ALPA)

January 2024

31%

Flight Attendants

Association of Flight Attendants (AFA-CWA)

May 2024

49%

Aircraft Technicians

International Brotherhood of Teamsters (IBT)

May 2025

Aircraft Appearance Agents

IBT

October 2023

Dispatchers

Transport Workers Union (TWU)

December 2021(b)

Material Specialists

IBT

March 2022(b)

<1%

Maintenance Controllers

IBT

October 2023

<1%

__________________

(a) Subject to standard early opener provisions.

The Company is self-insured for health care claims, subject to a stop-loss policy, for eligible participating employees and qualified dependent medical and dental claims, subject to deductibles and limitations. The Company’s liabilities for claims incurred but not reported are determined based on an estimate of the ultimate aggregate liability for claims incurred. The estimate is calculated from actual claim rates and adjusted periodically as necessary. The Company had accrued $6 million and $5 million for health care claims estimated to be incurred but not yet paid, as of June 30, 2023 and December 31, 2022, respectively, which are included as a component of other current liabilities on the Company’s condensed consolidated balance sheets.

General Indemnifications

The Company has various leases with respect to real property as well as various agreements among airlines relating to fuel consortia or fuel farms at airports. Under some of these contracts, the Company is party to joint and several liability regarding environmental damages. Under others, where the Company is a member of an LLC or other entity that contracts directly with the airport operator, liabilities are borne through the fuel consortia structure.

The Company’s aircraft, services, equipment lease and sale and financing agreements typically contain provisions requiring the Company, as the lessee, obligor or recipient of services, to indemnify the other parties to those agreements, including certain of those parties’ related persons, against virtually any liabilities that might arise from the use or operation of the aircraft or such other equipment. The Company believes that its insurance would cover most of its exposure to liabilities and related indemnities associated with the commercial real estate leases and aircraft, services, equipment lease and sale and financing agreements described above.

Certain of the Company’s aircraft and other financing transactions include provisions that require payments to preserve an expected economic return to the lenders if that economic return is diminished due to certain changes in law or regulations. In certain of these financing transactions and other agreements, the Company also bears the risk of certain changes in tax laws that would subject payments to non-U.S. entities to withholding taxes.

Certain of these indemnities survive the length of the related financing or lease. The Company cannot reasonably estimate the potential future payments under the indemnities and related provisions described above because it cannot predict (i) when and under what circumstances these provisions may be triggered, and (ii) the amount that would be payable if the provisions were triggered because the amounts would be based on facts and circumstances existing at such time.