Allegiant Travel is a leisure-focused airline that connects small and mid-sized U.S. cities to popular vacation destinations like Las Vegas, Orlando, and coastal Florida. Allegiant serves 578 routes across 126 cities, with roughly 75% of routes having no nonstop competition. Allegiant sells almost entirely direct to consumers through its own website, deliberately avoiding third-party travel agencies and global distribution systems to keep costs low. Its fleet consists of 106 Airbus A320 series and 16 Boeing 737 MAX aircraft, and Allegiant owns the vast majority of its fleet rather than leasing. Allegiant's model combines low base airfares with high ancillary revenue from unbundled add-ons like baggage fees, seat upgrades, and priority boarding. Allegiant also sells hotel rooms, rental cars, and travel insurance through third-party partnerships, and earns roughly $140M annually from its co-branded Allegiant Allways Visa card issued with Bank of America. On the cost side, Allegiant keeps aircraft utilization low by design, concentrating flying on peak leisure days and pulling back sharply in off-peak periods. Allegiant is mid-transition to the Boeing 737 MAX, which burns roughly 20% less fuel per passenger than the A320 and currently generates approximately 20-30% higher EBITDA per aircraft. In January 2026, Allegiant announced an agreement to acquire Sun Country Airlines, which would bring the combined fleet to approximately 195 aircraft.