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

Return flights

23 Dec - 31 Dec	VietJet Air
30 Dec - 19 Jan	AirAsia
23 Dec - 12 Jan	AirAsia
30 Dec - 16 Jan	AirAsia
30 Dec - 15 Jan	AirAsia
30 Dec - 17 Jan	AirAsia
30 Dec - 12 Jan	AirAsia
23 Dec - 10 Jan	AirAsia
30 Dec - 13 Jan	AirAsia
30 Dec - 14 Jan	AirAsia
21 Dec - 10 Jan	AirAsia
04 Dec - 10 Dec	AirAsia
06 Dec - 10 Dec	AirAsia
02 Dec - 10 Dec	AirAsia
05 Dec - 10 Dec	AirAsia
04 Dec - 11 Dec	AirAsia
06 Dec - 11 Dec	AirAsia
02 Dec - 11 Dec	AirAsia
04 Dec - 15 Dec	AirAsia
06 Dec - 15 Dec	AirAsia

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

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 December from $530

Return flights