Cheapest return flights from Seattle to Keflavik in January from 427€

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

Return flights

05 Jan - 15 Jan Icelandair direct
13 Jan - 20 Jan Icelandair direct
19 Jan - 26 Jan Icelandair direct
22 Jan - 29 Jan Icelandair direct
12 Jan - 07 Feb Icelandair direct
28 Jan - 04 Feb Icelandair direct
31 Jan - 07 Feb Icelandair direct
07 Jan - 11 Jan Lufthansa
09 Jan - 23 Jan Lufthansa
04 Jan - 15 Jan Icelandair direct
07 Jan - 14 Jan Icelandair direct
09 Jan - 23 Jan Icelandair direct
10 Jan - 17 Jan Icelandair direct
25 Jan - 01 Feb Icelandair direct

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

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