AirHint found the following cheapest return flights from Rijeka (RJK) to Osijek (OSI) in June 2025 (see full year).

Return flights

17 Jun - 19 Jun	Trade Air	direct
12 Jun - 19 Jun	Croatia Airlines	direct
10 Jun - 11 Jun	Croatia Airlines
17 Jun - 21 Jun	Trade Air
26 Jun - 30 Jun	Trade Air
18 Jun - 20 Jun	Ryanair
23 Jun - 28 Jun	Ryanair
20 Jun - 22 Jun	Eurowings
13 Jun - 15 Jun	Eurowings

Also check the deals for one-way flights from Rijeka to Osijek in June.

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 Rijeka to Osijek in June from $187

Return flights