Cheapest one-way flights from Seattle to Keflavik in June from $394

AirHint found the following cheapest one-way flights from Seattle (SEA) to Keflavik (KEF) in June 2026 (see full year).

One-Way flights

16 Jun WestJet
29 Jun WestJet
20 Jun WestJet
16 Jun Icelandair direct
12 Jun Icelandair direct
29 Jun Icelandair direct
20 Jun Icelandair direct
22 Jun WestJet
22 Jun Icelandair direct

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

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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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