Seattle to Portland in August 2026

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

Lowest this month $137

Highest this month $224

Sample fare $126

Airports SEA–PDX

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August 2026 price calendar

From $137 · up to $224

Mon

Tue

Wed

Thu

Fri

Sat

Sun

26 $224 27 $178 28 $178 29 $175 30 $137 31 $150

Portland PDX

$137

Aug 30, 7:08am · 1h 3m · 0 stops

SEA → PDX · Alaska Airlines

Portland PDX

$150

Aug 31, 7:08am · 1h 3m · 0 stops

SEA → PDX · Alaska Airlines

Portland PDX

$175

Aug 29, 8:35am · 58m · 0 stops

SEA → PDX · Alaska Airlines

Portland PDX

$178

Aug 28, 8:59pm · 1h 2m · 0 stops

SEA → PDX · Alaska Airlines

Portland PDX

$178

Aug 27, 7:08am · 1h 3m · 0 stops

SEA → PDX · Alaska Airlines

This page is only August 2026 on the Seattle to Portland 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 Seattle to Portland in August 2026.