what terminal is frontier at sfo

Frontier Airlines uses Terminal A at San Francisco International Airport (SFO) . However, according to one source, Frontier Airlines uses Terminal IN - International at SFO, which may change, so its best to check with the airline. Another source states that most domestic flights, including Frontier Airlines, run through Terminal 1. Therefore, it's recommended to check with the airline or the airport to confirm the terminal for Frontier Airlines at SFO.