Cheapest return flights from Washington to Keflavik in December from 1159€

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

Return flights

30 Dec - 06 Jan Icelandair direct
31 Dec - 06 Jan Icelandair direct
29 Dec - 31 Dec Icelandair direct
27 Dec - 31 Dec Icelandair direct
27 Dec - 03 Jan Icelandair direct
30 Dec - 04 Jan Icelandair
27 Dec - 01 Jan Icelandair direct
31 Dec - 04 Jan Icelandair
30 Dec - 02 Jan Icelandair direct
28 Dec - 04 Jan Lufthansa

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

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