Portland to Seattle in August 2026

Dated one-way fares from Portland to Seattle in August 2026. Use the calendar to see which days are cheaper.

Lowest this month $139

Highest this month $176

Sample fare $126

Airports PDX–SEA

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August 2026 price calendar

From $139 · up to $176

Mon

Tue

Wed

Thu

Fri

Sat

Sun

28 $176 29 $139 30 $151 31 $150

Seattle SEA

$139

Aug 29, 2:40pm · 7h 20m · 1 stop

PDX → SEA · Alaska Airlines

Seattle SEA

$150

Aug 31, 6:20am · 1h · 0 stops

PDX → SEA · Alaska Airlines

Seattle SEA

$151

Aug 30, 6:20am · 1h · 0 stops

PDX → SEA · Alaska Airlines

Seattle SEA

$176

Aug 28, 5:07am · 53m · 0 stops

PDX → SEA · Alaska Airlines

This page is only August 2026 on the Portland to Seattle route. Open the full route if you want the next months side by side.

Prices move as seats sell. Confirm the live itinerary before you book Portland to Seattle in August 2026.