San Francisco International Airport station is a Bay Area Rapid Transit (BART) reversal station on the Pittsburg/Bay Point–SFO/Millbrae line located inside the San Francisco International Airport, also known as SFO or SFIA.The station is located on level 3 of the International Terminal, next to Parking Garage G. There are two entrances and exits – one on level 3, adjacent to the grand foyer off the north side of the International Terminal; and the other is a level up at the Garage G/BART AirTrain station.Station layoutThe station is a terminus station. Trains enter from an elevated wye from the west side of Highway 101. There are three tracks and corresponding bay platforms. BART traffic to and from SFO has not been as high as originally anticipated, so only two of the three tracks are currently used in regular service, with the third sometimes being used for storage.Service historyService at this station began on June 22, 2003. Originally, there was a purple line for a shuttle service connecting SFO directly to Millbrae from 2003 to 2008. The shuttle trains usually had 5 cars and ran every 20 minutes. On January 1, 2008, BART eliminated direct service between the SFO station and Millbrae (except for a few trips scheduled during the first and last hour of service each day).Today, passengers traveling between SFO and Millbrae have to make a timed transfer at San Bruno station. As of September 2012, direct service between the SFO station and Millbrae is active after 8pm on weekdays, and all day on weekends and holidays. Passengers traveling between SFO and Millbrae still need to make a timed transfer at San Bruno during all other operating hours.
