Frontier Airlines operates at Terminal 1 (T1) at San Francisco International Airport (SFO). When flying with Frontier, you should proceed to Terminal 1 for check-in, security screening, and boarding.Frontier SFO Terminal is not just a point of departure or arrival; it is a destination in itself. From its awe-inspiring architecture and artistic displays to its diverse shopping and dining options, the terminal offers a multifaceted experience for travelers Upon arrival at SFO, follow the signs directing you to the baggage claim area. Once you have retrieved your luggage, head towards the exit, where you will find transportation options to various terminals. Look for the signs indicating Terminal 1 or the Harvey Milk Terminal. These signs are strategically placed throughout the airport, making it easy to locate your destination.