The average bus between SeaTac and Lake Union takes 56 min and the fastest bus takes 40 min. The bus service runs several times per day from SeaTac to Lake Union. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run every 3 hours between SeaTac and Lake Union. The earliest departure is at 12:26 AM at night, and the last departure from SeaTac is at 11:56 PM which arrives into Lake Union at 12:52 AM. All services require a transfer at 3rd Ave & Pine St and take an average of 56 min. The schedules shown below are for the next available departures.

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1h 1m • 1 changeWant to know about travelling from SeaTac to Lake Union? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from SeaTac to Lake Union. However, there are services departing from SeaTac station and arriving at Lake Union station via 3rd Ave & Pine St. The journey, including transfers, takes approximately 56 min.
SeaTac to Lake Union bus services, operated by Sound Transit, depart from SeaTac Station.
SeaTac to Lake Union bus services, operated by Sound Transit, arrive at 3rd Ave & Pine St station.
Book your SeaTac to Lake Union bus tickets online with Sound Transit and King County Metro.
The distance between SeaTac and Lake Union is 21.6 km. The road distance is 23 km.
Sound Transit operates a bus from SeaTac Station to 3rd Ave & Pine St every 3 hours. Tickets cost $3 and the journey takes 33 min.