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

Return flights

30 Jul - 05 Aug	jetBlue
02 Jul - 10 Jul	Spirit Airlines
01 Jul - 07 Jul	Spirit Airlines
20 Jul - 26 Jul	Icelandair
15 Jul - 21 Jul	Icelandair
02 Jul - 08 Jul	Spirit Airlines
08 Jul - 14 Jul	Spirit Airlines
12 Jul - 18 Jul	Spirit Airlines
11 Jul - 17 Jul	Spirit Airlines
13 Jul - 19 Jul	Spirit Airlines
06 Jul - 14 Jul	Spirit Airlines
26 Jul - 01 Aug	Icelandair
26 Jul - 03 Aug	Lufthansa
27 Jul - 02 Aug	Icelandair
31 Jul - 06 Aug	SWISS

Also check the deals for one-way flights from Chicago 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 Chicago to Ljubljana in July from $876

Return flights