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

Return flights

10 Sep - 23 Sep	Eurowings
09 Sep - 16 Sep	Ryanair
18 Sep - 23 Sep	Eurowings
11 Sep - 16 Sep	easyJet
02 Sep - 09 Sep	Ryanair
04 Sep - 09 Sep	easyJet
01 Sep - 09 Sep	Eurowings
11 Sep - 15 Sep	easyJet
18 Sep - 29 Sep	Eurowings
23 Sep - 01 Oct	easyJet
18 Sep - 24 Sep	Eurowings
30 Sep - 08 Oct	Ryanair
25 Sep - 03 Oct	LOT
23 Sep - 05 Oct	LOT
27 Sep - 06 Oct	Eurowings
25 Sep - 03 Oct	Eurowings	direct
26 Sep - 03 Oct	easyJet
20 Sep - 04 Oct	Eurowings
27 Sep - 04 Oct	Eurowings
29 Sep - 04 Oct	Eurowings

Also check the deals for one-way flights from Duesseldorf to Keflavik in September.

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 September from $230

Return flights