Spirit Airlines is based out of Houston's George Bush Intercontinental Airport (IAH), Terminal A. Terminal A, which is well-known for its light and airy layout, provides travelers with a convenient and contemporary travel experience. The IAH Terminal for Spirit Airlines offers a number of amenities, such as fast self-service kiosks, cozy waiting rooms, and easy access to restaurants and shops. Spirit Airlines offers quick check-in procedures and convenient access to security checkpoints, making it the perfect choice for those looking for a hassle-free trip.