The average bus between Mercer Island and Portland takes 5h 27m and the fastest bus takes 4h 11m. The bus service runs several times per day from Mercer Island to Portland. 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 4 times a day between Mercer Island and Portland. The earliest departure is at 7:02 AM in the morning, and the last departure from Mercer Island is at 6:37 PM which arrives into Portland at 1:45 AM. All services require a transfer at N Mercer Way & 80th Ave SE - Bay 1 and take an average of 5h 27m. The schedules shown below are for the next available departures.



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Want to know about travelling from Mercer Island to Portland? 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 Mercer Island to Portland. However, there are services departing from Mercer Island station and arriving at Portland station via Portland Curbside Bus Stop. The journey, including transfers, takes approximately 5h 27m.
Mercer Island to Portland bus services, operated by King County Metro, depart from Seattle Bus Station.
Mercer Island to Portland bus services, operated by King County Metro, arrive at Portland Curbside Bus Stop station.
The distance between Mercer Island and Portland is 230.3 km. The road distance is 293 km.
Flixbus USA operates a bus from Seattle Bus Station to Portland Curbside Bus Stop 4 times a day. Tickets cost $21–40 and the journey takes 3h 15m. Greyhound USA also services this route once daily.