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

Return flights

03 Sep - 17 Sep	Ryanair	direct
04 Sep - 17 Sep	Eurowings	direct
08 Sep - 17 Sep	Ryanair
10 Sep - 17 Sep	Ryanair
17 Sep - 24 Sep	Ryanair	direct
24 Sep - 01 Oct	Ryanair	direct
17 Sep - 01 Oct	Ryanair	direct
03 Sep - 09 Sep	Ryanair
04 Sep - 09 Sep	Eurowings
08 Sep - 17 Sep	Eurowings	direct
04 Sep - 16 Sep	Eurowings
04 Sep - 18 Sep	Eurowings
29 Sep - 06 Oct	Ryanair
28 Sep - 03 Oct	Ryanair
23 Sep - 02 Oct	Ryanair
27 Sep - 04 Oct	Austrian Airlines
22 Sep - 01 Oct	SKY express
29 Sep - 12 Oct	Eurowings
27 Sep - 05 Oct	Ryanair
24 Sep - 10 Oct	Ryanair

Also check the deals for one-way flights from Duesseldorf to Kos 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.

Book a cheap hotel in Kos

Cheap car rent in Kos

Cheapest return flights from Duesseldorf to Kos in September from 93€

Return flights