Spirit Airlines' operating base is Terminal A at San Antonio International Airport (SAT). Both domestic and foreign users can easily reach the gates and amenities of this Spirit Airlines SAT Terminal. Boarding gates, ticket desks, and security checkpoints are all conveniently located in Terminal A. Arriving early is recommended for passengers to provide time for security and check-in. in. Because Spirit Airlines' SAT terminal is so user-friendly, all passengers may travel with efficiency and ease.