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

Return flights

09 Sep - 16 Sep	Scoot
05 Sep - 09 Sep	Hainan Airlines
16 Sep - 03 Oct	Cathay Pacific
08 Sep - 15 Sep	Cathay Pacific
16 Sep - 19 Sep	Scoot
13 Sep - 29 Sep	Hainan Airlines
26 Sep - 12 Oct	Thai Lion Air
15 Sep - 27 Sep	AirAsia X
08 Sep - 27 Sep	AirAsia X
15 Sep - 02 Oct	AirAsia X
12 Sep - 27 Sep	AirAsia X
15 Sep - 30 Sep	AirAsia X
12 Sep - 02 Oct	AirAsia X
23 Sep - 11 Oct	Scoot
29 Sep - 06 Oct	China Southern
12 Sep - 30 Sep	AirAsia X
30 Sep - 09 Oct	China Eastern
26 Sep - 14 Oct	AirAsia X
26 Sep - 02 Oct	AirAsia X
26 Sep - 07 Oct	China Southern

Also check the deals for one-way flights from Hangzhou 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 Hangzhou to Sydney in September from $453

Return flights