Cheapest return flights from Miami to Keflavik in December from $377

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

Return flights

07 Dec - 13 Dec Icelandair direct
03 Dec - 11 Dec Icelandair direct
05 Dec - 09 Dec Icelandair direct
11 Dec - 15 Dec Spirit Airlines
09 Dec - 16 Dec Spirit Airlines
31 Dec - 24 Jan Icelandair direct
17 Dec - 10 Jan Icelandair direct
28 Dec - 17 Jan Icelandair direct
03 Dec - 27 Dec Icelandair direct
09 Dec - 14 Dec Spirit Airlines
03 Dec - 06 Dec Scandinavian Airlines
16 Dec - 10 Jan Scandinavian Airlines
27 Dec - 17 Jan Scandinavian Airlines
19 Dec - 10 Jan Icelandair direct
22 Dec - 29 Dec Frontier Airlines
02 Dec - 27 Dec FrenchBee
18 Dec - 10 Jan Frontier Airlines
30 Dec - 02 Jan Frontier Airlines
31 Dec - 03 Jan Icelandair
31 Dec - 03 Jan Icelandair direct

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

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