Originally Posted by
AussieOzzie
IMHO - SFO International's AirTrain+BART is the best public transit ride into a major city, which is probably why it costs 5x as much as the other 13 train/metro systems listed. - AO
As a cheaper alternative there's Samstrans 292 bus service. A couple of dollars going into town, $4 back to the airport: takes just over an hour, runs twice/three times an hour during the daytime.