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

Return flights

04 Dec - 07 Dec	Wizz Air
07 Dec - 10 Dec	Wizz Air
02 Dec - 06 Dec	easyJet
02 Dec - 07 Dec	easyJet
04 Dec - 11 Dec	Wizz Air
04 Dec - 08 Dec	Wizz Air
04 Dec - 10 Dec	Wizz Air
02 Dec - 09 Dec	easyJet
03 Dec - 08 Dec	Ryanair
26 Dec - 30 Dec	Wizz Air
17 Dec - 11 Jan	easyJet
26 Dec - 01 Jan	Wizz Air
19 Dec - 04 Jan	Wizz Air
28 Dec - 01 Jan	Fly Play	direct
17 Dec - 11 Jan	Icelandair	direct
20 Dec - 04 Jan	Ryanair
29 Dec - 04 Jan	Scandinavian Airlines
29 Dec - 05 Jan	Ryanair
20 Dec - 03 Jan	Ryanair
26 Dec - 04 Jan	Icelandair	direct

Also check the deals for one-way flights from Copenhagen 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 Copenhagen to Keflavik in December from 148€

Return flights