AirTrain page on SFO website
As a reminder, the Blue Line runs counterclockwise and goes all the way out to Long Term Parking, taking about 25 minutes for a full circuit. The much shorter Red Line runs clockwise and stays in a simple 9-minute loop within the five terminals, two international garages, and Grand Hyatt.
https://www.flysfo.com/passengers/gr...ing-around-sfo (includes map)
Home >> Passengers >> Ground Transportation >> Getting Around SFO
Quote:
Due to routine maintenance being performed on the AirTrain system between the hours of 11pm and 5am each night the AirTrain may be operating differently than normal and travel times may be extended. If you plan to use AirTrain during this period, please add additional travel time and pay close attention to all AirTrain signs and messages.
Id.