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

Return flights

21 Aug - 27 Aug	SWISS
28 Aug - 03 Sep	SWISS
29 Aug - 03 Sep	SWISS
16 Aug - 26 Aug	SWISS
18 Aug - 25 Aug	SWISS
21 Aug - 28 Aug	SWISS
03 Aug - 13 Aug	Air Serbia
28 Aug - 02 Sep	Eurowings
22 Aug - 29 Aug	Brussels Airlines
18 Aug - 22 Aug	SWISS
11 Aug - 14 Aug	Air Serbia
07 Aug - 11 Aug	Lufthansa

Also check the deals for one-way flights from Ljubljana to Porto 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 Porto in August from $260

Return flights