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

Return flights

01 Sep - 22 Sep	Eurowings
05 Sep - 22 Sep	Eurowings
01 Sep - 01 Oct	Eurowings
08 Sep - 29 Sep	Pegasus Airlines
13 Sep - 01 Oct	Pegasus Airlines
09 Sep - 29 Sep	Pegasus Airlines
01 Sep - 29 Sep	Eurowings
01 Sep - 28 Sep	Eurowings
29 Sep - 13 Oct	Eurowings
11 Sep - 29 Sep	Pegasus Airlines
10 Sep - 17 Sep	Pegasus Airlines
28 Sep - 13 Oct	Ryanair
30 Sep - 10 Oct	Pegasus Airlines
27 Sep - 01 Oct	Air Serbia
01 Sep - 15 Sep	Etihad Airways
02 Sep - 15 Sep	Etihad Airways
11 Sep - 02 Oct	Qatar Airways
08 Sep - 07 Oct	Qatar Airways
20 Sep - 02 Oct	Qatar Airways
14 Sep - 02 Oct	Qatar Airways

Also check the deals for one-way flights from Duesseldorf to Colombo 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 Colombo in September from $664

Return flights