AirHint found the following cheapest return flights from Zagreb (ZAG) to Sydney (SYD) in December 2025 (see full year).

Return flights

11 Dec - 23 Jan	Turkish Airlines
20 Dec - 18 Jan	Turkish Airlines
29 Dec - 20 Jan	Turkish Airlines
28 Dec - 19 Jan	Turkish Airlines
26 Dec - 08 Jan	Turkish Airlines
26 Dec - 06 Jan	Turkish Airlines
19 Dec - 09 Jan	Turkish Airlines
27 Dec - 02 Jan	Turkish Airlines
18 Dec - 11 Jan	Turkish Airlines
20 Dec - 03 Jan	Turkish Airlines

Also check the deals for one-way flights from Zagreb to Sydney in December.

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 Zagreb to Sydney in December from 1378€

Return flights