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

Return flights

09 Sep - 13 Sep	Eurowings	direct
25 Sep - 30 Sep	Eurowings	direct
06 Sep - 13 Sep	Eurowings	direct
13 Sep - 20 Sep	Eurowings	direct
20 Sep - 27 Sep	Eurowings	direct
27 Sep - 30 Sep	Eurowings	direct
11 Sep - 13 Sep	Eurowings	direct
25 Sep - 27 Sep	Eurowings	direct
06 Sep - 20 Sep	Eurowings	direct
20 Sep - 25 Sep	Eurowings	direct
20 Sep - 04 Oct	Eurowings	direct
30 Sep - 01 Oct	Eurowings
26 Sep - 06 Oct	Lufthansa

Also check the deals for one-way flights from Duesseldorf to Ljubljana 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 Ljubljana in September from $116

Return flights