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

Return flights

07 Sep - 14 Sep	Eurowings
07 Sep - 11 Sep	Eurowings
18 Sep - 21 Sep	Eurowings
04 Sep - 09 Sep	Eurowings
04 Sep - 08 Sep	Eurowings	direct
14 Sep - 21 Sep	Ryanair
27 Sep - 30 Oct	Eurowings
13 Sep - 21 Sep	Eurowings
04 Sep - 05 Sep	Eurowings	direct
07 Sep - 08 Sep	Eurowings	direct
27 Sep - 01 Oct	Eurowings
14 Sep - 18 Sep	Ryanair
26 Sep - 02 Oct	Eurowings
21 Sep - 05 Oct	Ryanair
29 Sep - 08 Oct	easyJet
29 Sep - 01 Oct	easyJet
27 Sep - 04 Oct	Eurowings
29 Sep - 04 Oct	easyJet
22 Sep - 05 Oct	Ryanair

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 216€

Return flights