Cheapest return flights from Washington to Keflavik in January from $375

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

Return flights

13 Jan - 21 Jan Icelandair direct
19 Jan - 26 Jan Icelandair direct
26 Jan - 30 Jan Icelandair direct
24 Jan - 29 Jan Icelandair direct
21 Jan - 27 Jan Icelandair direct
28 Jan - 02 Feb Icelandair direct
10 Jan - 16 Jan Icelandair direct
17 Jan - 24 Jan Icelandair direct
19 Jan - 24 Jan Icelandair direct
12 Jan - 17 Jan Icelandair direct
17 Jan - 21 Jan Icelandair direct

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

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