Cheapest return flights from Seattle to Keflavik in January from 339€

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

Return flights

13 Jan - 20 Jan Icelandair direct
19 Jan - 26 Jan Icelandair direct
28 Jan - 04 Feb Icelandair direct
29 Jan - 05 Feb Icelandair direct
09 Jan - 16 Jan Icelandair direct

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

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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