Cheapest one-way flights from Portland to Keflavik in October from $425

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

One-Way flights

27 Oct Hawaiian Airlines

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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