Cheapest return flights from Seattle to Keflavik in July from 520€

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 - 17 Jul Icelandair direct
15 Jul - 23 Jul Icelandair direct
10 Jul - 18 Jul Icelandair direct
16 Jul - 23 Jul Icelandair direct
07 Jul - 14 Jul Icelandair direct
07 Jul - 15 Jul Icelandair direct
27 Jul - 07 Aug Icelandair direct
12 Jul - 20 Jul Air France
03 Jul - 15 Jul Icelandair direct
12 Jul - 20 Jul Icelandair direct
17 Jul - 24 Jul Icelandair direct
27 Jul - 03 Aug Icelandair direct
27 Jul - 10 Aug Icelandair direct

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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