Allegiant focuses on vacation travelers going from colder climates in the North to warm vacation locations in the south. They often fly to the smaller cheaper airport in the area. For example in Orlando, Phoenix, and Tampa, they fly to the smaller Orlando Sanford, St. Pete–Clearwater, Phoenix–Mesa Gateway Airport. At all three airports they are the only airline flying there.
Part of the airline's lower cost structure includes operation of McDonnell Douglas MD-80 jets, which the airline can purchase and refurbish for as little as $4 million. Given the low cost of ownership, Allegiant is able to operate its aircraft less (seven flight hours per day on average versus 13 hours per day at JetBlue Airways), which helps keep labor costs lower. Overall, Allegiant operates with 35 full-time workers per plane compared to more than 50 at other carriers.