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

Return flights

04 Aug - 13 Aug	Air Serbia
20 Aug - 27 Aug	SWISS
07 Aug - 13 Aug	Lufthansa
05 Aug - 12 Aug	SWISS
28 Aug - 03 Sep	KLM
31 Aug - 07 Sep	Lufthansa
18 Aug - 23 Aug	SWISS
05 Aug - 10 Aug	SWISS
06 Aug - 10 Aug	SWISS
24 Aug - 31 Aug	Lufthansa
09 Aug - 13 Aug	SWISS
11 Aug - 15 Aug	SWISS
15 Aug - 02 Sep	SWISS

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

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 Ljubljana to Barcelona in August from $208

Return flights