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

Return flights

11 Jul - 18 Jul	Air Serbia
21 Jul - 22 Jul	Air Serbia
03 Jul - 08 Jul	Air Serbia
16 Jul - 19 Jul	Air Serbia
03 Jul - 04 Jul	Air Serbia
18 Jul - 21 Jul	Air Serbia
10 Jul - 11 Jul	Air Serbia
12 Jul - 22 Jul	Air Serbia
18 Jul - 22 Jul	Air Serbia
18 Jul - 20 Jul	Air Serbia
31 Jul - 03 Aug	Air Serbia
18 Jul - 02 Aug	Air Serbia
18 Jul - 03 Aug	Air Serbia
31 Jul - 04 Aug	Lufthansa	direct
18 Jul - 02 Aug	Lufthansa	direct
31 Jul - 03 Aug	Lufthansa	direct
18 Jul - 03 Aug	Lufthansa	direct

Also check the deals for one-way flights from Frankfurt to Ljubljana in July.

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 July from 207€

Return flights