Spirit Airlines San Diego International Airport operates out of Terminal 1 at San Diego International Airport (SAN) and provides affordable flights to a variety of domestic and international destinations. The airline offers online check-in up to 24 hours before departure, allowing clients to avoid long lines at the airport. Passengers checking in at Terminal 1 can access Spirit Airlines’ dedicated counters. Despite Spirit Airlines’ well-known low fares, additional fees could apply for baggage, preferred seating, and other services. To make your wait more comfortable, Terminal 1 offers a range of stores, eateries, and amenities. Spirit Airlines ensures a seamless flight from SAN, offering a convenient entry point for those seeking affordable flights to destinations both domestically and outside.