Cheapest return flights from Seattle to Keflavik in July from $505

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 July 2025 (see full year).

Return flights

09 Jul - 13 Jul WestJet
06 Jul - 13 Jul WestJet
12 Jul - 17 Jul WestJet
04 Jul - 13 Jul WestJet
02 Jul - 09 Jul WestJet
12 Jul - 17 Jul Icelandair direct
19 Jul - 16 Aug Icelandair direct
07 Jul - 14 Jul WestJet
14 Jul - 21 Jul WestJet
15 Jul - 22 Jul WestJet
16 Jul - 23 Jul WestJet
29 Jul - 05 Aug WestJet
19 Jul - 02 Aug WestJet
29 Jul - 05 Aug Icelandair direct
31 Jul - 07 Aug Icelandair direct
28 Jul - 04 Aug Icelandair direct
27 Jul - 04 Aug Icelandair direct
25 Jul - 01 Aug WestJet
30 Jul - 06 Aug WestJet
27 Jul - 03 Aug Delta

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

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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