Frontier Airlines (NASDAQ: ULCC), based in Denver, Colorado, is the largest ultra low-cost carrier in the United States. In 2025, the Company generated $3.7 billion of revenue and carried 33 million passengers across more than 440 nonstop routes serving over 100 airports in the U.S., Mexico, and the Caribbean. Frontier operates a structurally low-cost business model designed to deliver compelling value through low base fares, flexible optional services, a rewarding loyalty program, and a customer-friendly digital platform. Its all-Airbus A320neo family fleet, high-density seating, and weight-saving initiatives have resulted in the most fuel-efficient fleet among major U.S. carriers, supporting durable cost leadership and a structurally lower cost base relative to peers.