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

Return flights

15 Dec - 15 Jan	Wizz Air
15 Dec - 31 Dec	Wizz Air
04 Dec - 11 Dec	Wizz Air
07 Dec - 11 Dec	Wizz Air
06 Dec - 09 Dec	easyJet
16 Dec - 04 Jan	Ryanair
05 Dec - 08 Dec	Ryanair
08 Dec - 11 Dec	Wizz Air
03 Dec - 11 Dec	Wizz Air
03 Dec - 06 Dec	Wizz Air
02 Dec - 09 Dec	easyJet
08 Dec - 12 Jan	Wizz Air
05 Dec - 09 Dec	Wizz Air
15 Dec - 20 Jan	Scandinavian Airlines
15 Dec - 19 Jan	Scandinavian Airlines
31 Dec - 07 Jan	easyJet
18 Dec - 11 Jan	Ryanair
15 Dec - 18 Jan	KLM
22 Dec - 09 Jan	Wizz Air
08 Dec - 12 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 156€

Return flights