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

Return flights

29 Sep - 03 Oct	Air Serbia
16 Sep - 18 Sep	Air Serbia
16 Sep - 19 Sep	Air Serbia
15 Sep - 19 Sep	Air Serbia
20 Sep - 27 Sep	Air Serbia
12 Sep - 14 Sep	Air Serbia
17 Sep - 23 Sep	Air Serbia
15 Sep - 18 Sep	Air Serbia
13 Sep - 19 Sep	Air Serbia
13 Sep - 18 Sep	Air Serbia
12 Sep - 19 Sep	Air Serbia
28 Sep - 03 Oct	Air Serbia
30 Sep - 02 Oct	Air Serbia
21 Sep - 05 Oct	Air Serbia
27 Sep - 04 Oct	SWISS	direct
29 Sep - 01 Oct	Air Serbia
22 Sep - 06 Oct	Air Serbia
30 Sep - 08 Oct	Air Serbia
26 Sep - 06 Oct	Air Serbia
25 Sep - 05 Oct	easyJet

Also check the deals for one-way flights from Zurich 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 Zurich to Ljubljana in September from 183€

Return flights