Distance from Portland to Seattle
Portland to Seattle – Quick Distance Facts
Driving Distance
via I-5 North
Driving Time
under normal traffic
Straight-Line Distance
direct air distance
How to Drive from Portland to Seattle
The most popular route from Portland to Seattle by car is via I-5 North — the main highway connecting Oregon's largest city to Washington's largest city through the heart of the Pacific Northwest.
From downtown Portland, head north onto I-5. About 10 minutes from the city center.
Continue on I-5 through Vancouver, WA and Olympia. About 2 hours (~140 miles).
Continue on I-5 through Tacoma into Seattle. About 40 minutes (~33 miles). Exit depends on destination in Seattle.
Portland to Seattle – Travel Time by Speed
How long does the trip from Portland to Seattle take at different average speeds? Estimated time for a distance of ~173 miles:
| Average Speed | Estimated Time | Note |
|---|---|---|
| 50 mph | ~3h 28min | Mixed roads, delays |
| 60 mph | ~2h 53min | Standard highway driving |
| 70 mph | ~2h 28min | Max highway speed on I-5 |
These times reflect driving only, with no stops. Actual travel time including rest breaks and possible congestion is usually 2h 50min to 3h 30min.
Frequently Asked Questions – Portland to Seattle Distance
How far is Portland from Seattle by car?
The driving distance from Portland to Seattle is approximately 173 miles (278 km) via I-5 North.
How long does it take to drive from Portland to Seattle?
The driving time from Portland to Seattle is approximately 2 hours 50 minutes without stops via I-5. Including breaks and possible traffic, plan for 2h 50min to 3h 30min.
What is the straight-line distance between Portland and Seattle?
The direct (air) distance between Portland and Seattle is approximately 145 miles (233 km). The actual road distance is ~173 miles due to the I-5 route.
Is there a direct flight from Portland to Seattle?
Yes — several airlines operate direct flights between Portland and Seattle, with a flight time of approximately 45 minutes. Multiple daily departures are available from PDX to SEA.
How can I calculate the distance from Portland to Seattle?
Use the free distance calculator at the top of this page. It shows the exact road distance, driving time, and an interactive route map instantly and for free.