Cheapest return flights from Seattle to Keflavik in January from $477

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

Return flights

20 Jan - 27 Jan Icelandair direct
04 Jan - 13 Jan Icelandair direct
11 Jan - 16 Jan Icelandair direct
12 Jan - 17 Jan Icelandair direct
30 Jan - 28 Feb Icelandair direct
31 Jan - 28 Feb Icelandair direct
13 Jan - 20 Jan Icelandair direct
19 Jan - 26 Jan Icelandair direct
21 Jan - 28 Jan Icelandair direct
23 Jan - 30 Jan Icelandair direct
26 Jan - 02 Feb Icelandair direct
28 Jan - 04 Feb Icelandair direct
30 Jan - 06 Feb Icelandair direct
26 Jan - 06 Feb Icelandair direct
31 Jan - 08 Feb Icelandair direct
15 Jan - 22 Jan Icelandair direct
17 Jan - 24 Jan Lufthansa

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

Powered by

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Feel free to contact us with any feedback or request another flight research.