Cheapest return flights from Barcelona to Ljubljana in September from $194

Best time to book flights for Barcelona (BCN) to Ljubljana (LJU) flights at AirHint

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

Return flights

11 Sep - 15 Sep KLM
02 Sep - 08 Sep Air Serbia
09 Sep - 17 Sep SWISS
11 Sep - 14 Sep KLM
19 Sep - 26 Sep SWISS
18 Sep - 21 Sep Air Serbia
22 Sep - 29 Sep Air Serbia
18 Sep - 22 Sep SWISS
05 Sep - 10 Sep SWISS
21 Sep - 25 Sep SWISS
26 Sep - 05 Oct Air Serbia

Also check the deals for one-way flights from Barcelona to Ljubljana in September.

Skyscanner

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