Seattle Launches 24/7 Bus Service to SeaTac Airport

A new pilot program provides round-the-clock service to the city’s international airport.

1 minute read

March 16, 2026, 9:00 AM PDT

By Diana Ionescu @aworkoffiction


Cars pulling in at SeaTac airport drop-off area.

Cars drop off passengers at SeaTac airport. | EQRoy / Shutterstock

Seattle’s Sound Transit is launching a night bus pilot program that will offer 24-hour access to the Seattle-Tacoma International Airport.

According to an article in Mass Transit, “After trains stop running on March 28, the night bus—Route 570—will start rolling between downtown Seattle and SeaTac airport about every 30 minutes.” The bus will pick up passengers near Link stations in downtown Seattle, Tukwila International Boulevard, and at SeaTac/Airport Station.

The pilot is the start of a broader overnight network proposed in Sound Transit’s 2026 service plan. “Pending board approval, Sound Transit says it will roll out the full network as soon as fall 2026, with night routes between Seattle and Lakewood via SeaTac, Redmond via Bellevue, and Everett via Lynnwood, Wash.”

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