Cheapest return flights from Chicago to Ljubljana in September from $653

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

Return flights

10 Sep - 16 Sep LOT
02 Sep - 09 Sep LOT
17 Sep - 23 Sep jetBlue
24 Sep - 30 Sep LOT
25 Sep - 30 Sep LOT
02 Sep - 08 Sep Iberia
29 Sep - 05 Oct Turkish Airlines
26 Sep - 29 Sep LOT
20 Sep - 27 Sep Air Serbia
02 Sep - 10 Sep British Airways
16 Sep - 24 Sep Turkish Airlines
26 Sep - 04 Oct Turkish Airlines

Also check the deals for one-way flights from Chicago 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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