Portland to San Diego in August 2026

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

Lowest this month $145

Highest this month $171

Sample fare $129

Airports PDX–SAN

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August 2026 price calendar

From $145 · up to $171

Mon

Tue

Wed

Thu

Fri

Sat

Sun

26 $145 27 $158 28 $158 29 $158 30 $171

San Diego SAN

$145

Aug 26, 5:56pm · 5h 55m · 1 stop

PDX → SAN · Frontier Airlines

San Diego SAN

$171

Aug 30, 12:20pm · 11h 31m · 1 stop

PDX → SAN · Frontier Airlines

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