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

Return flights

26 Aug - 02 Sep	SWISS
23 Aug - 27 Aug	Lufthansa
21 Aug - 27 Aug	Lufthansa
22 Aug - 27 Aug	Lufthansa
20 Aug - 27 Aug	Lufthansa
25 Aug - 02 Sep	SWISS
23 Aug - 25 Aug	Lufthansa
21 Aug - 28 Aug	Lufthansa
25 Aug - 27 Aug	SWISS
26 Aug - 27 Aug	SWISS
20 Aug - 26 Aug	Lufthansa
25 Aug - 30 Aug	SWISS
29 Aug - 10 Sep	Air Serbia
25 Aug - 01 Sep	Air Serbia
25 Aug - 03 Sep	KLM
29 Aug - 01 Sep	Air Serbia
31 Aug - 07 Sep	Luxair

Also check the deals for one-way flights from Ljubljana to Lisbon 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 Lisbon in August from 238€

Return flights