Cheapest one-way flights from Seattle to Keflavik in June from $243

Best time to book flights for Seattle (SEA) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest one-way flights from Seattle (SEA) to Keflavik (KEF) in June 2025 (see full year).

One-Way flights

23 Jun WestJet
06 Jun WestJet
19 Jun Air Canada
07 Jun WestJet
03 Jun Alaska Airlines
23 Jun Icelandair direct
06 Jun Icelandair direct
07 Jun Icelandair direct
03 Jun Icelandair direct
19 Jun Icelandair direct

Also check the deals for return flights from Seattle to Keflavik in June.

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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