Cheapest return flights from Seattle to Keflavik in June from $715

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

Return flights

12 Jun - 19 Jun Icelandair direct
26 Jun - 03 Jul Icelandair direct
17 Jun - 23 Jun Icelandair direct
04 Jun - 11 Jun Icelandair direct
02 Jun - 09 Jun Icelandair direct
17 Jun - 24 Jun Icelandair direct
22 Jun - 29 Jun Icelandair direct
08 Jun - 15 Jun Icelandair direct
09 Jun - 16 Jun Icelandair direct
10 Jun - 17 Jun Icelandair direct
11 Jun - 18 Jun Icelandair direct

Also check the deals for one-way flights from Seattle to Keflavik in June.

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