Ground transportation

AirTrain
Main article: AirTrain (SFO)
AirTrain is the airport's people-mover system. Fully automated and free of charge, it connects all four terminals, the two international terminal garages, the BART station, and the airport's Rental Car Center.

Rail
BART
Main article: San Francisco International Airport (BART station)
The San Francisco International Airport (SFO) BART station, located in Parking Garage G of the International Terminal, is the only direct rail link between the airport, the city of San Francisco, and the general Bay Area. As of September 14, 2009, the SFO station is served by the Pittsburg/Bay Point - SFO/Millbrae line.

Caltrain
BART is SFO's connection to Caltrain at the Millbrae Station, which requires a transfer at the San Bruno station during most of BART's weekday operating hours; direct service between SFO and Millbrae is available on weekday evenings, weekends, and holidays. Caltrain used to offer a free shuttle to SFO airport from the Millbrae station, but it was replaced by the priced BART service when the BART SFO extension was completed. Alternately, SamTrans buses (see below) also provide connections to various Caltrain stations.

Bus
The San Francisco Municipal Railway, San Francisco's transit agency, does not provide service to the airport. However, SamTrans, San Mateo County's transit agency, does, with three lines connecting Terminal 2, Terminal 3, and the International Terminal to San Francisco and the Peninsula down to Palo Alto.

Numerous door-to-door van, airporter, limousine, hotel courtesy, and charter operators service the airport. Taxis, along with the aforementioned services, stop at the center island transportation island on the arrivals/baggage claim level of the airport.

Car
The airport is located on U.S. Route 101, 13 miles (21 km) south of downtown San Francisco. It is near the US 101 interchange with Interstate 380, a short freeway that connects US 101 with Interstate 280.

The airport provides both short-term and long-term parking facilities.

SFO with US 101 in the backgroundShort term parking is located in the central terminal area and two international terminal garages. Long term parking is located on South Airport Blvd. and San Bruno Ave. and are served by shuttle buses.

Passengers can also park long-term at a select number of BART stations that have parking lots, with a permit purchased online in advance.

Taxi
Taxis depart from designated taxi zones located at the roadway center islands, on the Arrivals/Baggage Claim Level of all terminals.