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

Return flights

02 Dec - 10 Dec	Wizz Air
05 Dec - 08 Dec	Wizz Air
02 Dec - 05 Dec	Wizz Air
04 Dec - 08 Dec	Wizz Air
30 Dec - 06 Jan	easyJet
05 Dec - 09 Dec	Wizz Air
02 Dec - 06 Dec	Wizz Air
06 Dec - 08 Dec	Wizz Air
04 Dec - 07 Dec	Wizz Air
05 Dec - 12 Dec	Wizz Air
01 Dec - 08 Dec	Jet2
29 Dec - 05 Jan	Scandinavian Airlines
31 Dec - 04 Jan	easyJet
29 Dec - 04 Jan	Scandinavian Airlines
31 Dec - 04 Jan	Icelandair	direct
30 Dec - 03 Jan	easyJet
22 Dec - 02 Jan	Scandinavian Airlines
23 Dec - 04 Jan	easyJet
28 Dec - 02 Jan	TUI
23 Dec - 04 Jan	Icelandair	direct

Also check the deals for one-way flights from Keflavik to Copenhagen 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 Keflavik to Copenhagen in December from $223

Return flights