Cheapest return flights from Seattle to Keflavik in January from 524€

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 January 2025 (see full year).

Return flights

31 Jan - 08 Feb jetBlue
31 Jan - 06 Feb jetBlue
26 Jan - 02 Feb Frontier Airlines
26 Jan - 09 Feb Frontier Airlines
26 Jan - 04 Feb Frontier Airlines
27 Jan - 03 Feb jetBlue
24 Jan - 01 Feb Alaska Airlines
31 Jan - 06 Feb Icelandair direct
27 Jan - 03 Feb Icelandair direct
23 Jan - 31 Jan Frontier Airlines
23 Jan - 30 Jan Frontier Airlines
23 Jan - 30 Jan Icelandair direct
26 Jan - 04 Feb Icelandair direct
23 Jan - 31 Jan Icelandair direct

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

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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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