Spirit AirlinesNKS/ NK

Spirit Airlines is a major ultra-low-cost carrier headquartered in Fort Lauderdale, Florida, founded in 1964 and operating as an independent airline focused on point-to-point domestic and international routes throughout the United States, the Caribbean, and Latin America. The airline operates from several key focus cities including Fort Lauderdale, Atlantic City, Chicago, and Detroit, with a business model emphasizing bare-bones fares and à la carte pricing for ancillary services such as baggage, seat selection, and beverages. Spirit does not maintain alliance memberships and operates a single-cabin economy configuration across its fleet, while its frequent flyer program, called "Free Spirit," rewards members with miles and benefits tied to their loyalty. As one of the largest ultra-low-cost carriers in North America, Spirit has built its reputation on offering some of the industry's lowest base fares, appealing to price-conscious leisure travelers willing to accept minimal onboard amenities and frills. The airline has expanded significantly over the years and remains a prominent player in the budget-friendly segment of the U.S. aviation market.