United Airlines San Francisco Airport Terminal refers to the specific terminal at San Francisco International Airport (SFO) where United Airlines operates its flights. United Airlines primarily uses Terminal 3 at SFO for its domestic and international flights. Passengers flying with United Airlines will check in, go through security, and board their flights from this terminal. Terminal 3 is equipped with various amenities, including food options, retail stores, and comfortable seating areas, ensuring a convenient and pleasant experience for travelers flying with United Airlines at San Francisco Airport.