BART Rapid Rail
BART operates rapid rail service to northern San Mateo County, San Francisco and the East Bay directly from SFO. The SFO BART Station is located on the Departures/Ticketing Level of the International Terminal (Boarding Area G side). BART is easily accessed from any terminal by riding SFO's AirTrain to the Garage G/BART Station stop. There is no charge to board AirTrain. Tickets can be purchased at the SFO BART Station upon arrival. BART provides a connection to Caltrain at the Millbrae station, but before 9:05 p.m. on weekdays, passengers must change BART trains at BART's San Bruno station.
Purchase BART vouchers in advance. Vouchers can only be redeemed at the SFO Information Booth located in the International Terminal G-side, near the AirTrain escalator, during the hours of 8:30 a.m. to 10:30 p.m. daily.
Caltrain Commuter Rail
Caltrain provides rail service at least once per hour until 10 p.m. between San Francisco and San Jose. Express trains operate during weekday commute hours, and some operate to Morgan Hill and Gilroy. BART connects SFO with Caltrain's Millbrae Station, but before 9:05 p.m. on weekdays, passengers must change BART trains at BART's San Bruno station.
SamTrans Public Bus Service
SamTrans provides 24-hour bus service connecting SFO with San Mateo County and parts of San Francisco. Routes KX, 292, 397 and 398 stop directly at the Airport terminals. Routes 140, 292 and 397 stop at the Rental Car Center and the United Airlines Maintenance Center. Routes 292 and 397 stop on North McDonnell Road at the Airport Business Center and West Field Road. Effective August 6, 2017, SamTrans launched a new, one-year Pilot Route 399 with all-nighter service between Daly City and Courtyard A.
At the terminals, SamTrans buses stop at:
Terminal 2: Arrivals/Baggage Claim Level, center island adjacent to Courtyard 2
Terminal 3: Arrivals/Baggage Claim Level, curbside adjacent to Courtyard 4
International Terminal: Level 1 at Courtyard A and curbside adjacent to Courtyard G