Cheapest return flights from Ljubljana to Barcelona in September from $192

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

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

Return flights

01 Sep - 08 Sep Air Serbia
30 Sep - 09 Oct Air Serbia
30 Sep - 10 Oct Air Serbia
30 Sep - 11 Oct KLM
01 Sep - 09 Sep SWISS
05 Sep - 12 Sep Air Serbia
05 Sep - 09 Sep Air Serbia
12 Sep - 15 Sep Air Serbia
02 Sep - 07 Sep SWISS
04 Sep - 12 Sep Air Serbia
04 Sep - 07 Sep KLM
30 Sep - 12 Oct SWISS
07 Sep - 14 Sep Lufthansa

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

Cheap car rent in Barcelona