Allegiant Travel Co. engages in the provision of leisure travel services. It operates through the Airline and Sunseeker Resort segments. The Airline segment involves the scheduled service air transportation, ancillary air-related and third-party products and services, fixed fee contract air transportation, and other airline-related revenue. The Sunseeker Resort segment includes hotel rooms and suites for occupancy, group meeting facilities, food and beverage options, the Aileron Golf Course, and other resort amenities. The company was founded in January 1997 and is headquartered in Las Vegas, NV.