AirHint found the following cheapest return flights from Split (SPU) to Osijek (OSI) in October 2025 (see full year).

Return flights

10 Oct - 17 Oct	Croatia Airlines	direct
17 Oct - 24 Oct	Croatia Airlines	direct
31 Oct - 03 Nov	Croatia Airlines
10 Oct - 12 Oct	Croatia Airlines
17 Oct - 19 Oct	Croatia Airlines
03 Oct - 06 Oct	Trade Air
03 Oct - 05 Oct	Croatia Airlines
04 Oct - 05 Oct	Croatia Airlines
01 Oct - 03 Oct	Croatia Airlines
18 Oct - 20 Oct	Croatia Airlines
12 Oct - 14 Oct	Croatia Airlines

Also check the deals for one-way flights from Split to Osijek 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 Split to Osijek in October from 78€

Return flights