Cheapest return flights from Oakland to Portland in May from $166

AirHint found the following cheapest return flights from Oakland (OAK) to Portland (PDX) in May 2026 (see full year).

Return flights

09 May - 10 May Alaska Airlines direct
02 May - 10 May Alaska Airlines direct
02 May - 03 May Alaska Airlines direct
20 May - 23 May Alaska Airlines direct
14 May - 16 May Alaska Airlines direct
28 May - 31 May Alaska Airlines direct
29 May - 31 May Alaska Airlines direct
22 May - 25 May Southwest Airlines
22 May - 25 May Alaska Airlines direct

Also check the deals for one-way flights from Oakland to Portland in May.

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