San Francisco International Airport (SFO) – Live TSA Wait Times & Traveler Updates

Q: Which terminals serve international flights at SFO?

The International Terminal (G and A Gates) handles nearly all international departures and arrivals. Some international carriers also operate from Terminal 2 for codeshare flights, but customs and immigration are centralized in the International Terminal.

Q: What’s the best way to get to and from SFO?

The BART (Bay Area Rapid Transit) system connects directly to the airport via the International Terminal, offering fast, affordable access to downtown San Francisco and the East Bay. Rideshares, taxis, and airport shuttles are also available on all terminal levels.

Q: Is SFO an eco-friendly airport?

Yes — SFO is a leader in green airport operations, with LEED-certified terminals, sustainable food programs, and a commitment to zero waste. It consistently ranks among the most environmentally progressive airports in the world.

Q: What time does TSA open at San Francisco International Airport?

TSA checkpoints at SFO generally open between 3:30 a.m. and 4:00 a.m., depending on the terminal. The International Terminal opens earlier for overseas departures, while Terminals 1–3 follow domestic flight schedules.

About San Francisco International Airport (SFO)

San Francisco International Airport (SFO) is the primary airport for the Bay Area, located about 13 miles south of downtown San Francisco. It serves as a major hub for United Airlines and Alaska Airlines, offering nonstop flights to more than 125 domestic and international destinations.

Known for its sleek, modern terminals and sustainability initiatives, SFO is one of the first airports in the world to achieve LEED Platinum certification. The airport’s four terminals — 1, 2, 3, and the International Terminal — are connected by the AirTrain, an automated people mover system that operates 24/7 for easy access between gates, garages, and the BART station.

Whether you’re traveling for business or leisure, SFO combines cutting-edge technology, art installations, and traveler comfort — making it one of the most passenger-friendly airports in the United States.

Security Checkpoints and Terminals at San Francisco International Airport (SFO)

San Francisco International Airport operates multiple TSA security checkpoints distributed across its four terminals:

Terminal 1 (Harvey Milk Terminal): Primarily used by Southwest, JetBlue, and Frontier Airlines.
Terminal 2: Home to Alaska Airlines and select American Airlines flights.
Terminal 3: United Airlines’ main domestic terminal, featuring TSA PreCheck and CLEAR lanes.
International Terminal: Serves most overseas flights with dedicated customs and security facilities.

Security checkpoints at SFO typically open around 3:30 a.m. and remain active until the last departing flight. The airport is busiest during early mornings (5:00–9:00 a.m.) and late afternoons (4:00–8:00 p.m.), particularly on Fridays and Sundays.

To save time, travelers can take advantage of TSA PreCheck, CLEAR, and Mobile Passport Control, which are available at all terminals. SFO also posts live wait time updates on airport monitors.

Frequently Asked Questions about San Francisco International Airport

Which terminals serve international flights at SFO?

The International Terminal (G and A Gates) handles nearly all international departures and arrivals. Some international carriers also operate from Terminal 2 for codeshare flights, but customs and immigration are centralized in the International Terminal.

What’s the best way to get to and from SFO?

The BART (Bay Area Rapid Transit) system connects directly to the airport via the International Terminal, offering fast, affordable access to downtown San Francisco and the East Bay. Rideshares, taxis, and airport shuttles are also available on all terminal levels.

Is SFO an eco-friendly airport?

Yes — SFO is a leader in green airport operations, with LEED-certified terminals, sustainable food programs, and a commitment to zero waste. It consistently ranks among the most environmentally progressive airports in the world.

What time does TSA open at San Francisco International Airport?

TSA checkpoints at SFO generally open between 3:30 a.m. and 4:00 a.m., depending on the terminal. The International Terminal opens earlier for overseas departures, while Terminals 1–3 follow domestic flight schedules.