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

Return flights

29 Sep - 30 Sep	Air Serbia
28 Sep - 30 Sep	Air Serbia
19 Sep - 22 Sep	SWISS	direct
26 Sep - 28 Sep	SWISS	direct
27 Sep - 03 Oct	Air Serbia
20 Sep - 27 Sep	SWISS	direct
25 Sep - 28 Sep	Air Serbia
28 Sep - 01 Oct	Air Serbia
28 Sep - 01 Oct	SWISS	direct
29 Sep - 01 Oct	Air Serbia
27 Sep - 03 Oct	SWISS	direct
29 Sep - 30 Sep	SWISS	direct
28 Sep - 30 Sep	SWISS	direct
29 Sep - 01 Oct	SWISS	direct

Also check the deals for one-way flights from Ljubljana to Zurich 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 Zurich in September from $210

Return flights