Transportation options from San Francisco International Airport to the San Francisco Marriott Hotel (55 4th Street)
To get from the Domestic Terminals to the International Terminal, you will need to take the AirTrain. The Red train route connects the terminals, while the Blue train route goes to the Rental Car Center.
You can also get to the Bart station via the AirTrain from the Domestic Terminals. The Bart station is located inside the International Terminal.