What Terminal is Frontier Airlines at San Diego Airport ? The airport’s parking lots, car-rental businesses, and other modes of transportation, including taxis, ride-sharing services, and public transportation, are all easily accessible from Terminal 1. A hassle-free journey to and from the airport is ensured by the variety of transportation options available to passengers, allowing them to choose the one that best fits their needs and tastes. Passengers on Frontier Airlines using San Diego International Airport will arrive in Terminal 1. This terminal makes traveling simple and enjoyable by providing a range of services, amenities, and quick access to boarding gates. Terminal 1 at SAN continues to be a crucial part of the passenger journey, providing a comfortable and effective environment for travelers, as Frontier Airlines grows its route network and offers affordable travel options.