Cheapest return flights from Portland to Keflavik in May from 583€

Best time to book flights for Portland (PDX) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Portland (PDX) to Keflavik (KEF) in May 2025 (see full year).

Return flights

01 May - 09 May jetBlue
01 May - 07 May Frontier Airlines
06 May - 12 May jetBlue
03 May - 10 May jetBlue
04 May - 12 May Air France
27 May - 02 Jun Air France
23 May - 30 May Air France
10 May - 20 May Air France
31 May - 11 Jun Air France
20 May - 28 May Virgin Atlantic
30 May - 08 Jun Air France
13 May - 22 May jetBlue
25 May - 01 Jun Icelandair direct
24 May - 30 May Alaska Airlines
26 May - 05 Jun WestJet
31 May - 06 Jun jetBlue

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

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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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