Air Canada operates from Terminal 1 at San Francisco International Airport (SFO). This terminal offers passengers a variety of amenities, including dining, shopping, and comfortable lounges. What terminal is Air Canada at SFO? The answer is Terminal 1, where Air Canada’s check-in counters are conveniently located to ensure a smooth start to your journey. Passengers flying with Air Canada from SFO can also access TSA PreCheck, making the security process quicker and more efficient.