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

Return flights

22 Dec - 29 Dec	Icelandair	direct
21 Dec - 26 Dec	Icelandair	direct
21 Dec - 28 Dec	Icelandair	direct
15 Dec - 10 Jan	Frontier Airlines
07 Dec - 27 Dec	Frontier Airlines
29 Dec - 12 Jan	Icelandair
28 Dec - 12 Jan	Icelandair
22 Dec - 27 Dec	Icelandair
20 Dec - 27 Dec	Frontier Airlines
23 Dec - 30 Dec	Sun Country Airlines
30 Dec - 06 Jan	Sun Country Airlines
23 Dec - 01 Jan	Frontier Airlines
28 Dec - 04 Jan	Icelandair
29 Dec - 04 Jan	Icelandair
26 Dec - 04 Jan	Sun Country Airlines
27 Dec - 03 Jan	Sun Country Airlines

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

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Minneapolis to Keflavik in December from 514€

Return flights