Spirit Airlines operates flights from IAH Airport Terminal A at George Bush Intercontinental Airport in Houston. Known for its ultra-low-cost model, Spirit Airlines offers affordable travel options to various destinations. Passengers flying with Spirit Airlines IAH Terminal A can expect a straightforward experience with essential services. The airline emphasizes online check-in and a la carte pricing to keep fares competitive. Spirit Airlines has established itself as a key player in budget-friendly air travel from IAH Airport Terminal A.