There are 144.85 miles from Portland to Seattle in north direction and 173 miles (278.42 kilometers) by car, following the I-5 route.
Portland and Seattle are 3 hours 25 mins far apart, if you drive non-stop.
This is the fastest route from Portland, OR to Seattle, WA. The halfway point is Centralia, WA.
Portland, OR and Seattle, WA are in the same time zone (Pacific Daylight Time). Current time in both locations is 11:11 pm.
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