Cheapest return flights from Seattle to Keflavik in June from $591

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

Return flights

09 Jun - 16 Jun Icelandair direct
01 Jun - 08 Jun Icelandair direct
02 Jun - 09 Jun Icelandair direct
03 Jun - 10 Jun Icelandair direct
05 Jun - 12 Jun Icelandair direct
06 Jun - 13 Jun Icelandair direct
08 Jun - 15 Jun Icelandair direct
16 Jun - 28 Jun KLM
07 Jun - 14 Jun Air France
16 Jun - 28 Jun Icelandair direct
24 Jun - 05 Jul Icelandair direct
24 Jun - 01 Jul Icelandair direct
29 Jun - 06 Jul Icelandair direct
23 Jun - 05 Jul Icelandair direct
26 Jun - 05 Jul Icelandair direct

Also check the deals for one-way 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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