Cheapest return flights from Seattle to Keflavik in July from $480

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

Return flights

24 Jul - 30 Jul Icelandair direct
08 Jul - 16 Jul Icelandair direct
09 Jul - 17 Jul Icelandair direct
04 Jul - 11 Jul Icelandair direct
10 Jul - 16 Jul Icelandair direct
07 Jul - 14 Jul Icelandair direct
13 Jul - 20 Jul Icelandair direct
10 Jul - 14 Jul Icelandair direct
12 Jul - 20 Jul Icelandair direct
14 Jul - 14 Aug Icelandair direct
24 Jul - 31 Jul Icelandair direct
31 Jul - 07 Aug Icelandair direct
30 Jul - 05 Aug Icelandair direct
31 Jul - 06 Aug Icelandair direct
29 Jul - 05 Aug Icelandair direct
24 Jul - 01 Aug Icelandair direct
29 Jul - 06 Aug Icelandair direct
27 Jul - 01 Aug Icelandair direct
25 Jul - 01 Aug Icelandair direct
30 Jul - 06 Aug Icelandair direct

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

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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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