Operating out of Terminal 1 at San Diego International Airport (SAN), Frontier Airlines SAN Terminal is well-known for its affordable tickets and welcoming customer service. Terminal 1, which is conveniently close to downtown San Diego, provides travelers flying with Frontier Airlines with a seamless and effective travel experience. Frontier Airlines makes sure that your trip through SAN is as stress-free as possible by providing eating options, contemporary conveniences, and convenient access to check-in booths and gates. At SAN, Frontier Airlines is committed to make your travels both economical and pleasurable, whether you're going to see new places or coming home.