Cheapest return flights from Portland to San Jose in September from $554

Best time to book flights for Portland (PDX) to San Jose (SJO) flights at AirHint

AirHint found the following cheapest return flights from Portland (PDX) to San Jose (SJO) in September 2025 (see full year).

Return flights

19 Sep - 28 Sep Alaska Airlines

Also check the deals for one-way flights from Portland to San Jose in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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