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

Return flights

13 Aug - 19 Aug	Air Serbia
06 Aug - 08 Aug	Air Serbia
29 Aug - 02 Sep	Air Serbia
29 Aug - 04 Sep	Air France
06 Aug - 09 Aug	Air Serbia
06 Aug - 10 Aug	Air Serbia
09 Aug - 10 Aug	Air Serbia
18 Aug - 19 Aug	Air Serbia
21 Aug - 25 Aug	Air Serbia
30 Aug - 07 Sep	Air Serbia
13 Aug - 02 Sep	Air Serbia
27 Aug - 04 Sep	Lufthansa	direct
14 Aug - 18 Aug	Air Serbia
01 Aug - 04 Aug	Air Serbia
05 Aug - 09 Aug	Air Serbia
29 Aug - 01 Sep	Air Serbia
28 Aug - 04 Sep	Lufthansa	direct
27 Aug - 03 Sep	Lufthansa	direct
13 Aug - 02 Sep	Lufthansa	direct
29 Aug - 04 Sep	Lufthansa	direct

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Ljubljana in August from 197€

Return flights