Cheapest return flights from Portland to Keflavik in October from 538€

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 October 2025 (see full year).

Return flights

12 Oct - 20 Oct Alaska Airlines
13 Oct - 20 Oct Alaska Airlines
21 Oct - 28 Oct jetBlue
21 Oct - 31 Oct jetBlue
12 Oct - 19 Oct Alaska Airlines
18 Oct - 24 Oct jetBlue
28 Oct - 07 Nov Alaska Airlines
13 Oct - 19 Oct Alaska Airlines
14 Oct - 24 Oct Air France
06 Oct - 16 Oct Air France
14 Oct - 23 Oct KLM
28 Oct - 04 Nov Alaska Airlines
28 Oct - 03 Nov Alaska Airlines
27 Oct - 03 Nov Alaska Airlines
27 Oct - 03 Nov Icelandair direct
28 Oct - 03 Nov Icelandair direct
29 Oct - 08 Nov Alaska Airlines
30 Oct - 05 Nov Alaska Airlines
28 Oct - 07 Nov Icelandair direct
30 Oct - 09 Nov Icelandair direct

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

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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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