Cheapest one-way flights from Portland to Keflavik in October from $430

AirHint found the following cheapest one-way flights from Portland (PDX) to Keflavik (KEF) in October 2025 (see full year).

One-Way flights

01 Oct Alaska Airlines
28 Oct Icelandair direct
30 Oct Icelandair direct
25 Oct Icelandair direct
27 Oct Icelandair direct
09 Oct Icelandair direct
11 Oct Icelandair direct
13 Oct Icelandair direct
15 Oct Icelandair direct
16 Oct Icelandair direct

Also check the deals for return flights from Portland to Keflavik in October.

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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