Gates and check-in desks are easily accessible from Frontier Airlines SFO Terminal For convenient access, the terminal features moving walkways, escalators, and elevators. The exit and security gates are properly marked with signs. Before your flight, you can visit the local eateries and stores. The structure of the terminal makes traveling with Frontier simple, regardless of your time of arrival. All kinds of tourists, including families and the elderly, like the ease of use and straightforward navigation.