Regarding SFO, "The SFO BART Station is located on the Departures/Ticketing Level of the International Terminal (Boarding Area G side)." - it is located at the

Regarding SFO, "The SFO BART Station is located on the Departures/Ticketing Level of the International Terminal (Boarding Area G side)." - it is located at the airport (you need to take AirTrain from other terminals, though). Not sure why connection to Caltrain matters, as BART itself has about 7 times more daily raiders and connects to more places.