how far is seattle from portland

Seattle and Portland are roughly 145–175 miles apart, depending on whether you measure straight-line distance or driving distance.

Basic distances

• Straight-line city-center distance: about 145 miles (around 233 km).

• Typical driving route (via I‑5 between city centers): about 170–175 miles (roughly 270–280 km).

• Air distance between Seattle–Tacoma (SEA) and Portland (PDX): about 129 miles (208 km).

Typical travel times

• By car on I‑5: about 3–4.5 hours , depending on traffic and exact start/end points.

• By plane (SEA ↔ PDX): about 45–60 minutes in the air, plus airport time for check‑in and security.

Simple rule of thumb

If you’re planning a trip, think of Seattle–Portland as a 3–4 hour drive or a short hop flight of about 130 miles , with the two cities sitting a little under 150 miles apart in a straight line.