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

Return flights

01 Sep - 01 Oct	Eurowings
25 Sep - 01 Oct	Eurowings
25 Sep - 06 Oct	easyJet
14 Sep - 19 Sep	Eurowings	direct
23 Sep - 01 Oct	Ryanair
14 Sep - 18 Sep	Eurowings
25 Sep - 02 Oct	Eurowings
25 Sep - 29 Sep	easyJet
14 Sep - 22 Sep	Eurowings
21 Sep - 29 Sep	Eurowings	direct
21 Sep - 13 Oct	Ryanair
11 Sep - 15 Sep	easyJet
30 Sep - 13 Oct	Ryanair
23 Sep - 30 Sep	Ryanair
14 Sep - 22 Sep	Eurowings	direct
18 Sep - 29 Sep	Eurowings	direct
25 Sep - 03 Oct	Eurowings
16 Sep - 22 Sep	easyJet
28 Sep - 03 Oct	Ryanair
28 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 200€

Return flights