SFO–Millbrae line

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SFO–Millbrae line
Purple Line train at SFIA station (2), February 2019.JPG
SFO–Millbrae line train at SFO station in February 2019
TypeRapid transit
SystemBay Area Rapid Transit
StatusOperational (weekdays and Sundays)
LocaleSan Francisco Peninsula
TerminiSan Francisco International Airport station
Millbrae station
OpenedJune 22, 2003
February 11, 2019
ClosedFebruary 9, 2004
Operator(s)San Francisco Bay Area Rapid Transit District
Line length1.7 miles (2.7 km)
Track gauge5 ft 6 in (1,676 mm)
ElectrificationThird rail, 1000 V DC
Route map

SFO–Millbrae line
S.F. Int'l Airport
AirTrain (San Francisco International Airport)
San Francisco International Airport
  Richmond–​Daly City/​Millbrae
Caltrain Parking

The SFO–Millbrae line is a Bay Area Rapid Transit (BART) line in the San Francisco Bay Area that runs between Millbrae station and San Francisco International Airport station. The line is a shuttle service with no intermediate stops; it shares tracks with two of the five other mainline BART services. Service began on February 11, 2019; a previous version of the shuttle operated from June 2003 to February 2004.

The line is colored purple on maps, and BART has begun to call it the Purple Line.[1] The line runs until 9 pm on weekdays and at all times on Sundays. On weeknights and Saturdays, the Antioch–SFO/Millbrae line runs between SFO and Millbrae.

Service history[edit]

Detail from 2003 BART map showing the SFO-Millbrae shuttle service

When the BART-SFO Extension opened on June 22, 2003, the Pittsburg/Bay Point line was extended to Millbrae station, while the Dublin/Pleasanton line was extended to San Francisco International Airport station. Direct service between the two terminals was provided by the Millbrae–SFO Line, which operated every 20 minutes.[2] The line, depicted as purple on maps, was discontinued in February 2004 during the first of several service changes on the extension.[3]

For the next several years, direct service between the two terminals was provided by other BART lines: by the Richmond line (weekdays) and Pittsburg/Bay Point line (nights and weekends) until September 12, 2005, then by the Dublin/Pleasanton line.[3][4] On January 1, 2008, direct service between Millbrae and the airport was discontinued, forcing passengers to transfer at San Bruno station.[5] Direct service between the stations was restored on September 14, 2009 during nights and weekends as an extension of the Pittsburg/Bay Point line.[6]

On June 24, 2018, SamTrans began operating route SFO - a dedicated bus service between the two stations. Unlike BART service, the bus route operates on irregular headways timed to meet certain Caltrain trains at Millbrae.[7] On February 11, 2019, BART resumed direct SFO–Millbrae service at all times. On weekdays until 9 pm and on Sundays, a dedicated shuttle train operates between the two stations, with timed transfers to Antioch line trains at SFO. Weeknight and Saturday service continue to be part of the Antioch line.[1]


Station Jurisdiction County Opened Other BART
San Francisco International Airport SFO San Mateo June 22, 2003
Millbrae Millbrae


  1. ^ a b "February 11 schedule change impacts weekdays and Sundays" (Press release). San Francisco Bay Area Rapid Transit District. January 15, 2019.
  2. ^ Cabanatuan, Michael (April 18, 2003). "BART to link to SFO June 22 / After many delays, latest date is firm, transit officials say". San Francisco Chronicle.
  3. ^ a b Cabanatuan, Michael (February 7, 2004). "BART changing schedule so more go to SFO / Peninsula ridership below expectations, needs a boost". San Francisco Chronicle.
  4. ^ Murphy, Dave (August 11, 2005). "PENINSULA / BART to airport to be cut / Weekend trains to be kept on Peninsula". San Francisco Chronicle.
  5. ^ Gordon, Rachel (December 9, 2007). "BART to raise fares, increase train frequency starting Jan. 1". San Francisco Chronicle.
  6. ^ "Off-peak service reductions began Monday, September 14th" (Press release). San Francisco Bay Area Rapid Transit District. September 15, 2009.
  7. ^ "SamTrans Launches ECR Rapid, Route SFO" (Press release). San Mateo County Transit District. June 19, 2018.

External links[edit]

Route map:

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