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

Return flights

09 Dec - 12 Dec	easyJet
15 Dec - 19 Dec	easyJet
09 Dec - 16 Dec	easyJet
07 Dec - 14 Dec	KLM
04 Dec - 08 Dec	KLM
04 Dec - 07 Dec	KLM
03 Dec - 10 Dec	KLM
10 Dec - 14 Dec	KLM
01 Dec - 07 Dec	KLM
01 Dec - 05 Dec	easyJet
19 Dec - 01 Jan	easyJet
30 Dec - 05 Jan	Scandinavian Airlines
25 Dec - 07 Jan	LOT
30 Dec - 03 Jan	Scandinavian Airlines
29 Dec - 05 Jan	Scandinavian Airlines
20 Dec - 04 Jan	LOT
22 Dec - 02 Jan	easyJet
26 Dec - 04 Jan	Eurowings
28 Dec - 04 Jan	Scandinavian Airlines
18 Dec - 02 Jan	Ryanair

Also check the deals for one-way flights from Duesseldorf 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 Duesseldorf to Keflavik in December from 172€

Return flights