Arrivals and departures for Southwest Airlines SAN Terminal are handled out of Terminal 1 at San Diego International Airport (SAN). Southwest, one of the biggest airlines at SAN, connects travelers to major U.S. cities with a large number of domestic flights. S. With baggage claim areas, self-service kiosks, TSA security checkpoints, check-in counters, and a range of dining and shopping options, Terminal 1 offers a simplified travel experience. For a quicker process, passengers are advised to check in online. Southwest Airlines guarantees a hassle-free and seamless travel experience at San Diego International Airport through its dedication to customer satisfaction and effective operations.