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

Return flights

30 Sep - 04 Oct	Eurowings	direct
27 Sep - 04 Oct	Eurowings	direct
18 Sep - 20 Sep	Eurowings	direct
09 Sep - 16 Sep	Eurowings	direct
20 Sep - 27 Sep	Eurowings	direct
18 Sep - 25 Sep	Eurowings	direct
23 Sep - 30 Sep	Eurowings	direct
16 Sep - 20 Sep	Eurowings	direct
02 Sep - 13 Sep	Eurowings	direct
11 Sep - 18 Sep	Eurowings	direct
02 Sep - 06 Sep	Eurowings	direct
06 Sep - 09 Sep	Eurowings	direct

Also check the deals for one-way flights from Ljubljana 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 Ljubljana to Duesseldorf in September from $117

Return flights