Cheapest return flights from Seattle to Keflavik in June from $557

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

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

Return flights

04 Jun - 10 Jun Icelandair direct
01 Jun - 09 Jun Icelandair direct
02 Jun - 10 Jun Icelandair direct
04 Jun - 11 Jun KLM
03 Jun - 11 Jun Delta
05 Jun - 12 Jun Icelandair direct
03 Jun - 11 Jun Icelandair direct
09 Jun - 17 Jun Icelandair direct
04 Jun - 11 Jun Icelandair direct
09 Jun - 20 Jun Icelandair direct
27 Jun - 05 Jul Icelandair direct
29 Jun - 07 Jul Icelandair direct
25 Jun - 03 Jul Icelandair direct
23 Jun - 01 Jul Icelandair direct
26 Jun - 04 Jul Icelandair direct
22 Jun - 03 Jul Icelandair direct
30 Jun - 07 Jul Icelandair direct
28 Jun - 09 Jul Icelandair direct
23 Jun - 04 Jul Icelandair direct
29 Jun - 10 Jul Icelandair direct

Also check the deals for one-way 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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