The average bus between SeaTac and Chehalis takes 4h 26m and the fastest bus takes 3h 46m. The bus service runs several times per day from SeaTac to Chehalis. 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 4 hours between SeaTac and Chehalis. The earliest departure is at 4:33 AM at night, and the last departure from SeaTac is at 3:08 PM which arrives into Chehalis at 7:19 PM. All services require a transfer at SR512 Park & Ride - Zone G and take an average of 4h 26m. The schedules shown below are for the next available departures.



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Arrives next day



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Want to know about travelling from SeaTac to Chehalis? 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 Chehalis. However, there are services departing from SeaTac station and arriving at Chehalis station via SR 512 P&R - Zone H. The journey, including transfers, takes approximately 4h 26m.
SeaTac to Chehalis bus services, operated by Sound Transit, depart from SeaTac Station.
SeaTac to Chehalis bus services, operated by Sound Transit, arrive at Mellen Street e-Transit Station - 1401 Mellen St..
The distance between SeaTac and Chehalis is 101.4 km. The road distance is 148 km.
You can take a bus from SeaTac Station to S Market Blvd. & SW 1st St. - 21 S Market Blvd. via SR512 Park & Ride - Zone G, Capitol Way at State Ave, Olympia Transit Center - 280 Washington St NE, and Mellen Street e-Transit Station - 1401 Mellen St. in around 5h 32m.