Cheapest return flights from Seattle to Keflavik in January from 512€

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

07 Jan - 14 Jan jetBlue
10 Jan - 16 Jan Alaska Airlines
31 Jan - 03 Feb Frontier Airlines
24 Jan - 31 Jan Frontier Airlines
24 Jan - 27 Jan Frontier Airlines
10 Jan - 13 Jan Frontier Airlines
08 Jan - 15 Jan Alaska Airlines
26 Jan - 31 Jan Alaska Airlines
12 Jan - 21 Jan Frontier Airlines
10 Jan - 17 Jan Frontier Airlines
15 Jan - 22 Jan Icelandair direct
31 Jan - 03 Feb 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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