AirHint found the following cheapest return flights from Kos (KGS) to Duesseldorf (DUS) in September 2026 (see full year).

Return flights

02 Sep - 23 Sep	Ryanair	direct
16 Sep - 23 Sep	Ryanair	direct
02 Sep - 16 Sep	Ryanair	direct
02 Sep - 09 Sep	Ryanair	direct
30 Sep - 21 Oct	Ryanair	direct
16 Sep - 02 Oct	Ryanair
02 Sep - 14 Sep	Ryanair
14 Sep - 23 Sep	SKY express
21 Sep - 23 Sep	SKY express
23 Sep - 02 Oct	Ryanair
30 Sep - 02 Oct	Ryanair
30 Sep - 16 Oct	Ryanair
14 Sep - 16 Sep	SKY express
02 Sep - 20 Sep	Ryanair
26 Sep - 10 Oct	SWISS
16 Sep - 20 Sep	Ryanair
16 Sep - 05 Oct	Ryanair
23 Sep - 05 Oct	Ryanair
30 Sep - 05 Oct	Ryanair
14 Sep - 02 Oct	SKY express

Also check the deals for one-way flights from Kos to Duesseldorf 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 Kos to Duesseldorf in September from 143€

Return flights