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

Return flights

24 Sep - 26 Sep	Ryanair
22 Sep - 26 Sep	Eurowings	direct
16 Sep - 23 Sep	Ryanair
22 Sep - 30 Sep	Eurowings	direct
30 Sep - 02 Oct	Ryanair
19 Sep - 26 Sep	Eurowings	direct
30 Sep - 01 Oct	Ryanair
22 Sep - 23 Sep	Eurowings
10 Sep - 14 Sep	Ryanair
23 Sep - 25 Sep	Ryanair
07 Sep - 14 Sep	Ryanair
07 Sep - 10 Sep	Ryanair
28 Sep - 01 Oct	Ryanair
29 Sep - 01 Oct	Eurowings	direct
24 Sep - 01 Oct	Eurowings	direct
26 Sep - 03 Oct	Eurowings
30 Sep - 03 Oct	Ryanair
22 Sep - 02 Oct	Eurowings	direct
29 Sep - 02 Oct	Eurowings
30 Sep - 04 Oct	Ryanair

Also check the deals for one-way flights from Duesseldorf to Copenhagen 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 Copenhagen in September from $173

Return flights