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

Return flights

10 Dec - 17 Dec	easyJet
08 Dec - 12 Dec	easyJet
16 Dec - 23 Dec	easyJet
07 Dec - 14 Dec	British Airways
04 Dec - 07 Dec	Lufthansa
10 Dec - 14 Dec	easyJet
23 Dec - 30 Dec	Eurowings
25 Dec - 31 Dec	LOT
22 Dec - 02 Jan	Eurowings
30 Dec - 06 Jan	easyJet
19 Dec - 21 Dec	easyJet
29 Dec - 03 Jan	Eurowings
27 Dec - 05 Jan	Scandinavian Airlines

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 194€

Return flights