Cheapest return flights from Detroit to Keflavik in December from $330

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

Return flights

04 Dec - 08 Dec Icelandair direct
03 Dec - 10 Dec Spirit Airlines
04 Dec - 07 Dec Lufthansa
25 Dec - 01 Jan Icelandair direct
18 Dec - 10 Jan Icelandair
27 Dec - 01 Jan Icelandair direct
31 Dec - 07 Jan Icelandair
19 Dec - 10 Jan Sun Country Airlines
25 Dec - 31 Dec Icelandair
19 Dec - 26 Dec Southwest Airlines
13 Dec - 03 Jan Frontier Airlines
25 Dec - 30 Dec Icelandair
24 Dec - 04 Jan jetBlue
29 Dec - 03 Jan Spirit Airlines
13 Dec - 03 Jan Icelandair direct
29 Dec - 03 Jan Icelandair direct

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

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