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

Return flights

23 Sep - 26 Sep	Air Serbia
21 Sep - 26 Sep	Air Serbia
16 Sep - 24 Sep	Air Serbia
30 Sep - 08 Oct	Air Serbia
23 Sep - 28 Sep	Air Serbia
29 Sep - 13 Oct	Air Serbia
19 Sep - 22 Sep	Air Serbia
16 Sep - 19 Sep	Air Serbia
24 Sep - 28 Sep	Air Serbia
20 Sep - 26 Sep	Air Serbia
12 Sep - 15 Sep	Air Serbia
17 Sep - 21 Sep	Air Serbia
29 Sep - 03 Oct	Air Serbia
29 Sep - 02 Oct	Air Serbia
30 Sep - 04 Oct	SWISS

Also check the deals for one-way flights from Berlin 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 Berlin to Ljubljana in September from $167

Return flights