United Airlines Terminal SFO serves both domestic and international travelers through Terminal 3 and the G gates of the International Terminal. The SFO United terminal is modern, traveler-friendly, and equipped with fast United Airlines SFO check-in services, dining options, and United Club lounges. Whether you\'re catching United flights from SFO or arriving, you’ll find clear signage and helpful staff to guide you. Most United Airlines SFO departures operate from Terminal 3, while international routes depart from the G gates. San Francisco Airport United terminals are designed for efficiency, making your journey smoother and more comfortable from start to finish.