Frontier

Frontier Airlines (ICAO: FFT) is a major American ultra-low-cost carrier headquartered in Denver, Colorado. The airline was founded on February 8, 1994, by former employees of the original Frontier Airlines, aiming to re-establish regional air service following Continental Airlines' reduction of flights from Denver. Scheduled flights commenced on July 5, 1994, initially using Boeing 737-200 jetliners. After facing financial difficulties, Frontier underwent restructuring in 2013 and emerged with its current ultra-low-cost business model.

The airline's main operational base is Denver International Airport (DEN). In addition to Denver, Frontier maintains several other operational bases across the United States, including Atlanta (ATL), Chicago–Midway (MDW), Chicago–O'Hare (ORD), Cincinnati (CVG), Cleveland (CLE), Dallas/Fort Worth (DFW), Las Vegas (LAS), Miami (MIA), Orlando (MCO), Philadelphia (PHL), Phoenix–Sky Harbor (PHX), San Juan (SJU), Tampa (TPA), and Trenton (TTN).

Frontier Airlines operates an exclusively Airbus fleet, primarily consisting of Airbus A320 family aircraft, including the A320-200, A320neo, A321-200, and A321neo models. Its fleet is notably one of the youngest and most fuel-efficient in the U.S., with an average age of approximately 4.67 years as of late 2024. Each aircraft in its fleet features a distinctive animal on its tail. Frontier's route network encompasses over 120 domestic and international destinations across the United States, the Caribbean, Mexico, and Central America. As an ultra-low-cost carrier, Frontier is not a member of any major airline alliance. However, it does engage in codeshare agreements and partnerships with other airlines to broaden its network. The airline offers various seating options, including Standard Seating, Preferred Seating for quicker deplaning, and Premium Seating with extra legroom. In April 2024, Frontier introduced UpFront Plus, a premium seating category in the first two rows featuring extra legroom and a guaranteed empty middle seat. A dedicated First Class cabin is planned for introduction in early 2026.