Spirit Airlines George Bush Airport offers reasonably priced options for both local and international flights, out of George Bush Intercontinental Airport (IAH). Spirit, which is well-known for its simple, low-cost business philosophy, lets customers customize their journey by selecting extras like luggage and seat preference. The airline offers quick and easy boarding and check-in procedures to make traveling more convenient. While they wait for their flights, travelers can take advantage of a range of shopping and food opportunities at IAH. For visitors on a tight budget who want to see new places from Houston, Spirit Airlines is a great option because of its emphasis on price and basic amenities.