United Airlines Terminal SFO is primarily Terminal 3 for domestic flights and the G gates in the International Terminal for international travel. The SFO United terminal offers fast United Airlines SFO check-in, TSA PreCheck, baggage services, and United Club access. Most United Airlines SFO departures operate from Terminal 3, while international United flights from SFO leave from the G gates. Clear signs and digital boards help passengers navigate easily. Whether you\'re arriving or departing, San Francisco Airport United services ensure a smooth and convenient experience. Always check your boarding pass or flight details in advance to confirm your terminal and gate.