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

Return flights

20 Aug - 26 Aug	SWISS
19 Aug - 27 Aug	SWISS
18 Aug - 26 Aug	SWISS
19 Aug - 26 Aug	SWISS
14 Aug - 20 Aug	SWISS
25 Aug - 01 Sep	SWISS
25 Aug - 02 Sep	SWISS
13 Aug - 20 Aug	SWISS
28 Aug - 01 Sep	Lufthansa
25 Aug - 03 Sep	SWISS
12 Aug - 19 Aug	SWISS
12 Aug - 20 Aug	SWISS
29 Aug - 01 Sep	SWISS
06 Aug - 13 Aug	SWISS
08 Aug - 19 Aug	Lufthansa
25 Aug - 04 Sep	SWISS
26 Aug - 04 Sep	SWISS
29 Aug - 06 Sep	Air Serbia
28 Aug - 06 Sep	SWISS
31 Aug - 06 Sep	Vueling Airlines

Also check the deals for one-way flights from Barcelona to Ljubljana 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 Barcelona to Ljubljana in August from 178€

Return flights