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

Return flights

22 Sep - 20 Oct	VietJet Air
29 Sep - 13 Oct	VietJet Air
22 Sep - 19 Oct	VietJet Air
22 Sep - 22 Oct	VietJet Air
26 Sep - 20 Oct	VietJet Air
26 Sep - 15 Oct	VietJet Air
22 Sep - 15 Oct	VietJet Air
22 Sep - 12 Oct	VietJet Air
25 Sep - 20 Oct	VietJet Air
19 Sep - 12 Oct	VietJet Air
22 Sep - 29 Sep	Scoot
20 Sep - 28 Sep	AirAsia X
21 Sep - 23 Sep	Emirates

Also check the deals for one-way flights from Sydney to Belgrade 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 Sydney to Belgrade in September from $1356

Return flights