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

Return flights

25 Sep - 09 Oct	Lufthansa
25 Sep - 29 Sep	Lufthansa
27 Sep - 29 Sep	Lufthansa
27 Sep - 03 Oct	Lufthansa
29 Sep - 07 Oct	Lufthansa
27 Sep - 04 Oct	Air Serbia
27 Sep - 02 Oct	Air Serbia
27 Sep - 01 Oct	Air Serbia
29 Sep - 04 Oct	Air Serbia
23 Sep - 30 Sep	SWISS
24 Sep - 29 Sep	Lufthansa
20 Sep - 15 Oct	Lufthansa
24 Sep - 01 Oct	Lufthansa
22 Sep - 29 Sep	SWISS
28 Sep - 04 Oct	SWISS
20 Sep - 27 Sep	Lufthansa
23 Sep - 23 Sep	SWISS
21 Sep - 25 Sep	SWISS
23 Sep - 25 Sep	Lufthansa
24 Sep - 25 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.

Book a cheap hotel in Ljubljana

Cheap car rent in Ljubljana

Cheapest return flights from Paris to Ljubljana in September from $249

Return flights