Cheapest return flights from Washington to Keflavik in December from 361€

AirHint found the following cheapest return flights from Washington (IAD) to Keflavik (KEF) in December 2025 (see full year).

Return flights

10 Dec - 15 Dec Icelandair direct
11 Dec - 24 Dec Scandinavian Airlines
05 Dec - 12 Dec Icelandair direct
13 Dec - 17 Dec Icelandair direct
13 Dec - 24 Dec Icelandair direct
12 Dec - 15 Dec Icelandair direct
03 Dec - 07 Dec Icelandair direct
13 Dec - 05 Jan Icelandair direct
06 Dec - 09 Dec Scandinavian Airlines
06 Dec - 09 Dec Icelandair direct
24 Dec - 17 Jan Scandinavian Airlines
21 Dec - 26 Dec Icelandair direct
24 Dec - 17 Jan Icelandair direct
29 Dec - 06 Jan Icelandair direct
08 Dec - 03 Jan TAP
27 Dec - 02 Jan Icelandair
25 Dec - 03 Jan Frontier Airlines
19 Dec - 04 Jan Icelandair

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

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