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

Return flights

07 Sep - 22 Sep	Ryanair
07 Sep - 14 Sep	Lufthansa
23 Sep - 05 Oct	Turkish Airlines
26 Sep - 09 Oct	Turkish Airlines
06 Sep - 22 Sep	Qatar Airways
20 Sep - 27 Sep	Qatar Airways
11 Sep - 21 Oct	Condor
12 Sep - 21 Oct	Condor

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

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 September from 1075€

Return flights