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

Return flights

28 Oct - 05 Nov	Lufthansa
26 Oct - 03 Nov	SWISS
24 Oct - 01 Nov	LOT
25 Oct - 01 Nov	LOT
08 Oct - 16 Oct	Turkish Airlines
04 Oct - 12 Oct	Turkish Airlines
02 Oct - 10 Oct	Turkish Airlines
10 Oct - 18 Oct	Turkish Airlines

Also check the deals for one-way flights from Chicago to Ljubljana in October.

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 Chicago to Ljubljana in October from $718

Return flights