Cheapest return flights from Portland to Keflavik in August from $652

AirHint found the following cheapest return flights from Portland (PDX) to Keflavik (KEF) in August 2026 (see full year).

Return flights

25 Aug - 01 Sep Alaska Airlines
17 Aug - 24 Aug Delta
18 Aug - 25 Aug KLM
20 Aug - 27 Aug Air France
21 Aug - 28 Aug Delta
22 Aug - 29 Aug KLM
16 Aug - 24 Aug Delta
17 Aug - 25 Aug Delta
18 Aug - 26 Aug KLM
20 Aug - 28 Aug Air France
21 Aug - 29 Aug Delta
25 Aug - 01 Sep Icelandair direct

Also check the deals for one-way flights from Portland to Keflavik in August.

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