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

Return flights

21 Oct - 24 Oct	VietJet Air
31 Oct - 08 Nov	Scoot Tigerair
15 Oct - 30 Oct	VietJet Air
30 Oct - 05 Nov	AirAsia
31 Oct - 05 Nov	AirAsia
27 Oct - 05 Nov	AirAsia
30 Oct - 01 Nov	AirAsia
30 Oct - 12 Nov	AirAsia
30 Oct - 10 Nov	AirAsia
29 Oct - 01 Nov	AirAsia
29 Oct - 12 Nov	AirAsia
29 Oct - 10 Nov	AirAsia
27 Oct - 30 Oct	AirAsia
24 Oct - 30 Oct	AirAsia
26 Oct - 30 Oct	AirAsia
24 Oct - 27 Oct	AirAsia
15 Oct - 27 Oct	AirAsia
25 Oct - 30 Oct	AirAsia
25 Oct - 27 Oct	AirAsia
18 Oct - 30 Oct	AirAsia

Also check the deals for one-way flights from Hanoi to Sydney in October.

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 October from $337

Return flights