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

Return flights

06 Dec - 09 Dec	easyJet
04 Dec - 07 Dec	Wizz Air
02 Dec - 05 Dec	Icelandair	direct
03 Dec - 06 Dec	Icelandair	direct
01 Dec - 04 Dec	Icelandair	direct
04 Dec - 07 Dec	Icelandair	direct
05 Dec - 08 Dec	Icelandair	direct
06 Dec - 09 Dec	Icelandair	direct
07 Dec - 10 Dec	Icelandair	direct
08 Dec - 11 Dec	Icelandair	direct
22 Dec - 01 Jan	easyJet
31 Dec - 04 Jan	easyJet
23 Dec - 01 Jan	Ryanair
28 Dec - 01 Jan	Icelandair
25 Dec - 04 Jan	Wizz Air
28 Dec - 02 Jan	Scandinavian Airlines
28 Dec - 05 Jan	Scandinavian Airlines
20 Dec - 04 Jan	easyJet
26 Dec - 01 Jan	easyJet
19 Dec - 04 Jan	Scandinavian Airlines

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 $167

Return flights