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

Return flights

31 Jul - 05 Aug	SWISS
14 Jul - 17 Jul	Brussels Airlines
22 Jul - 28 Jul	Air France
14 Jul - 18 Jul	Norwegian
23 Jul - 28 Jul	Wizz Air
11 Jul - 14 Jul	Norwegian
13 Jul - 19 Jul	SWISS
12 Jul - 14 Jul	Norwegian
21 Jul - 26 Jul	Norwegian
04 Jul - 06 Jul	KLM
31 Jul - 31 Jul	SWISS

Also check the deals for one-way flights from Oslo 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 Oslo to Ljubljana in July from 298€

Return flights