Spirit Airlines is based at Houston, Texas's George Bush Intercontinental Airport (IAH), Terminal A. The Spirit Airlines IAH Terminal is renowned for its user-friendly amenities and simple navigation, which ensure a seamless and effective travel experience. Budget flights are available on Spirit Airlines, and Terminal A offers easy check-in, security checkpoints, and a variety of restaurants and shopping options. Spirit Airlines at IAH Terminal A guarantees a convenient beginning to your trip, whether you're traveling for business or pleasure.