OverviewPublic Transportation at San Francisco International Airport include the efficient Metro rail services via BART & Caltrain, and SamTrans Public Buses:
1. BART Rapid Rail serves directly northern San Mateo County, San Francisco, and the East Bay. The SFO BART Station is at the International Terminal's Departures/Ticketing level - at Boarding Area G side. (If arriving at either Terminals 1, 2 or 3 - take the free inter-terminal AirTrain to Garage G/ Bart Station stop.) BART connects to Caltrain at the Millbrae station.
2. Caltrain starts at Millbrae station and runs daily to either San Jose or San Francisco; it also offers weekday commuter-hour service to Gilroy, including some express service at select stations..
3. SamTrans Public Buses run 24/7, serving San Mateo County and parts of Palo Alto & San Francisco. SamTrans buses stop at (a) Terminal 1's Arrivals / baggage claim level, curbside next to Courtyard 2, and (b) at the International Terminal's level 1 at Courtyard A, and curbside next to Courtyard G.