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

Return flights

06 Aug - 08 Aug	Air Serbia
21 Aug - 25 Aug	Air Serbia
28 Aug - 01 Sep	Air Serbia
28 Aug - 05 Sep	Air Serbia
14 Aug - 18 Aug	Air Serbia
04 Aug - 07 Aug	Air Serbia
01 Aug - 04 Aug	Air Serbia
22 Aug - 25 Aug	Air Serbia
13 Aug - 20 Aug	Air Serbia
22 Aug - 26 Aug	Air Serbia
29 Aug - 01 Sep	Air Serbia
30 Aug - 04 Sep	Air France
01 Aug - 03 Aug	Air Serbia
22 Aug - 28 Aug	Air Serbia
28 Aug - 05 Sep	Lufthansa	direct
30 Aug - 13 Sep	Ryanair
30 Aug - 03 Sep	LOT
24 Aug - 02 Sep	SWISS
24 Aug - 02 Sep	Lufthansa	direct
31 Aug - 13 Sep	SWISS

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 $231

Return flights