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

Return flights

11 Dec - 12 Dec	Ryanair
11 Dec - 21 Dec	Ryanair
11 Dec - 21 Dec	Icelandair	direct
17 Dec - 08 Jan	Ryanair
08 Dec - 11 Jan	Ryanair
09 Dec - 14 Dec	Ryanair
09 Dec - 16 Dec	easyJet
10 Dec - 17 Dec	Scandinavian Airlines	direct
18 Dec - 30 Dec	Wizz Air
11 Dec - 15 Dec	Ryanair
10 Dec - 13 Dec	Wizz Air
16 Dec - 09 Jan	Ryanair
16 Dec - 10 Jan	Ryanair
06 Dec - 11 Dec	Ryanair
18 Dec - 07 Jan	Wizz Air
30 Dec - 07 Jan	LOT
16 Dec - 07 Jan	Ryanair
22 Dec - 07 Jan	Wizz Air
11 Dec - 05 Jan	Ryanair
14 Dec - 05 Jan	Wizz Air

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 193€

Return flights