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

Return flights

18 Dec - 22 Dec	Ryanair
19 Dec - 22 Dec	Ryanair
27 Dec - 30 Dec	Ryanair
22 Dec - 29 Dec	Ryanair
24 Dec - 31 Dec	Eurowings
27 Dec - 01 Jan	Ryanair
28 Dec - 04 Jan	Ryanair
29 Dec - 02 Jan	Ryanair
30 Dec - 02 Jan	Ryanair

Also check the deals for one-way flights from Cologne 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 Cologne to Keflavik in December from 253€

Return flights