Frontier Airlines is an ultra-low-cost carrier (ULCC) based in Denver, Colorado, providing low-fare passenger air service to leisure and visiting-friends-and-relatives travelers across roughly 100 U.S. airports and select destinations in Mexico, the Caribbean, and Central America. Frontier's business model rests on two revenue streams: low base fares (~40% of revenue per passenger) designed to attract price-sensitive travelers, and ancillary revenue (~60% of revenue per passenger) from bags, seat selection, bundles, and onboard purchases. Frontier operates a single Airbus A320 family fleet with high-density seating (~209 seats per departure), which simplifies maintenance and training, and its A320neo-heavy fleet drives fuel efficiency that management claims leads major U.S. carriers. Frontier sells roughly 70% of tickets through direct channels (website, app, contact centers), with the remainder through OTAs and GDSs. Frontier's cost advantage versus peers — management targets 40%+ below competitors on a total unit cost basis — is the foundation of its ability to price profitably at low fare levels. The company also earns revenue through a co-branded credit card, hotel and car rental commissions, and loyalty programs including FRONTIER Miles, Discount Den, and the GoWild! All-You-Can-Fly Pass. Frontier's near-term strategy focuses on returning 24 excess aircraft leases, slowing fleet growth to ~10% annual ASM growth, targeting $200M in annual run-rate cost savings by 2027, improving operational reliability, and expanding its loyalty ecosystem with planned additions of first-class seating and onboard Wi-Fi.