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

Return flights

30 Sep - 02 Oct	Transavia France	direct
29 Sep - 30 Sep	Air Serbia
27 Sep - 02 Oct	Air Serbia
30 Sep - 04 Oct	Air Serbia
30 Sep - 04 Oct	Transavia France	direct
23 Sep - 07 Oct	Transavia France
27 Sep - 04 Oct	Air Serbia
18 Sep - 21 Sep	Transavia France
18 Sep - 24 Sep	Transavia France
30 Sep - 06 Oct	Transavia France
30 Sep - 08 Oct	Transavia France
18 Sep - 20 Sep	Transavia France
28 Sep - 02 Oct	LOT
27 Sep - 30 Sep	easyJet
18 Sep - 20 Sep	Transavia France	direct
26 Sep - 09 Oct	Wizz Air
22 Sep - 29 Sep	SWISS
21 Sep - 27 Sep	SWISS
24 Sep - 28 Sep	Wizz Air Malta
20 Sep - 24 Sep	Lufthansa

Also check the deals for one-way flights from Paris 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 Paris to Ljubljana in September from 133€

Return flights