How to get around SFO? How to get to Rental Car at SFO (San Francisco international airport)?
AirTrain
SFO's AirTrain provides service for people move between terminals, garages and BART station, AirTrain is free to ride and can be boarded from any terminal. At every station, it departures as frequent as every four minutes.
AirTrain operates two lines:
* The Red Line connects all terminals, terminal garages and the BART Station.
* The Blue Line connects the Rental Car Center with all terminals, terminal garages and the BART Station.