Cheapest return flights from Frankfurt to Ljubljana in September from $252

Best time to book flights for Frankfurt (FRA) to Ljubljana (LJU) flights at AirHint

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

Return flights

10 Sep - 14 Sep Air Serbia
26 Sep - 29 Sep Air Serbia
22 Sep - 28 Sep Lufthansa direct
02 Sep - 05 Sep Air Serbia
13 Sep - 27 Sep Air Serbia
05 Sep - 06 Sep Air Serbia
14 Sep - 27 Sep Air Serbia
05 Sep - 06 Sep Lufthansa direct
26 Sep - 29 Sep Lufthansa direct

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

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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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