Cheapest return flights from Seattle to Keflavik in April from $574

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 April 2025 (see full year).

Return flights

28 Apr - 09 May Air France
30 Apr - 07 May Air France
28 Apr - 08 May Air France
30 Apr - 22 May Icelandair direct
30 Apr - 07 May Icelandair direct
28 Apr - 09 May Icelandair direct
28 Apr - 08 May Icelandair direct

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

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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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