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

Return flights

10 Sep - 19 Sep	VietJet Air
06 Sep - 11 Sep	Scoot Tigerair
05 Sep - 09 Oct	Scoot Tigerair
13 Sep - 20 Sep	VietJet Air
10 Sep - 21 Sep	Scoot Tigerair
07 Sep - 16 Sep	VietJet Air
06 Sep - 15 Sep	VietJet Air
27 Sep - 25 Oct	VietJet Air
14 Sep - 17 Sep	China Southern
10 Sep - 20 Sep	VietJet Air
22 Sep - 11 Oct	AirAsia
02 Sep - 04 Sep	AirAsia
23 Sep - 11 Oct	AirAsia
06 Sep - 09 Sep	AirAsia
22 Sep - 04 Oct	AirAsia
22 Sep - 02 Oct	AirAsia
22 Sep - 07 Oct	AirAsia
23 Sep - 04 Oct	AirAsia
30 Sep - 11 Oct	AirAsia
23 Sep - 02 Oct	AirAsia

Also check the deals for one-way flights from Hanoi 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 Hanoi to Sydney in September from $324

Return flights