The average bus between Sammamish and Portland takes 4h 33m and the fastest bus takes 3h 53m. The bus service runs several times per day from Sammamish 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 5 times a day between Sammamish and Portland. The earliest departure is at 6:47 AM in the morning, and the last departure from Sammamish is at 8:26 PM which arrives into Portland at 12:20 AM. All services require a transfer at Airport Way S & S Royal Brougham Way and take an average of 4h 33m. The schedules shown below are for the next available departures.

5h 24m • 1 change
4h 44m • 1 change
4h 24m • 1 changeArrives next day

3h 53m • 1 change
4h 18m • 1 change
5h 25m • 1 change
4h 45m • 1 change
4h 23m • 1 change
4h 27m • 1 change
5h 17m • 1 change
4h 50m • 1 change
4h 11m • 1 change
4h 27m • 1 change
5h 17m • 1 change
4h 50m • 1 change
4h 11m • 1 change
4h 27m • 1 change
5h 17m • 1 change
4h 50m • 1 changeArrives next day

3h 56m • 1 changeWant to know about travelling from Sammamish 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 Sammamish to Portland. However, there are services departing from Sammamish station and arriving at Portland station via Portland Curbside Bus Stop. The journey, including transfers, takes approximately 4h 33m.
Sammamish to Portland bus services, operated by Sound Transit, depart from Seattle Bus Station.
Sammamish to Portland bus services, operated by Sound Transit, arrive at Portland Curbside Bus Stop station.
The distance between Sammamish and Portland is 239.9 km. The road distance is 311 km.
Flixbus USA operates a bus from Seattle Bus Station to Portland Curbside Bus Stop 3 times a day. Tickets cost $24–40 and the journey takes 3h 35m. Greyhound USA also services this route twice daily.