The SFO–Millbrae line (also known as the SFO–Millbrae shuttle) was a Bay Area Rapid Transit (BART) shuttle line in the San Francisco Bay Area that ran between Millbrae station and San Francisco International Airport station (SFO).

[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.

[11] On March 6, 2022, a break in a power cable near Berkeley caused SFO–Richmond service to be temporarily discontinued.