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

Return flights

25 Sep - 30 Sep	Eurowings	direct
23 Sep - 30 Sep	Eurowings	direct
20 Sep - 27 Sep	Eurowings	direct
30 Sep - 11 Oct	Eurowings	direct
16 Sep - 20 Sep	Eurowings	direct
27 Sep - 30 Sep	Eurowings	direct
16 Sep - 23 Sep	Eurowings	direct
09 Sep - 20 Sep	Eurowings	direct
13 Sep - 20 Sep	Eurowings	direct
23 Sep - 25 Sep	Eurowings	direct
20 Sep - 23 Sep	Eurowings	direct
30 Sep - 07 Oct	Eurowings	direct
27 Sep - 04 Oct	Eurowings	direct
23 Sep - 04 Oct	Eurowings	direct
15 Sep - 01 Oct	SWISS
22 Sep - 03 Oct	SWISS
29 Sep - 06 Oct	SWISS
26 Sep - 06 Oct	Lufthansa
25 Sep - 05 Oct	SWISS

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 107€

Return flights