Cheapest return flights from Seattle to Keflavik in July from $721

AirHint found the following cheapest return flights from Seattle (SEA) to Keflavik (KEF) in July 2026 (see full year).

Return flights

23 Jul - 10 Aug Icelandair direct
08 Jul - 01 Aug Icelandair direct
08 Jul - 09 Jul 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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