Cheapest return flights from Seattle to Keflavik in July from $501

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

01 Jul - 08 Jul WestJet
19 Jul - 26 Jul Icelandair direct
30 Jul - 06 Aug WestJet
15 Jul - 22 Jul WestJet
08 Jul - 15 Jul WestJet
23 Jul - 30 Jul WestJet
29 Jul - 05 Aug WestJet
13 Jul - 20 Jul WestJet
21 Jul - 01 Aug WestJet
06 Jul - 13 Jul WestJet
24 Jul - 31 Jul WestJet
26 Jul - 02 Aug WestJet
31 Jul - 07 Aug WestJet
25 Jul - 01 Aug WestJet
29 Jul - 05 Aug Icelandair direct
09 Jul - 17 Jul Icelandair direct
15 Jul - 22 Jul Icelandair direct
31 Jul - 07 Aug Icelandair direct
30 Jul - 06 Aug Icelandair direct
28 Jul - 04 Aug WestJet

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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