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

Return flights

26 Dec - 10 Jan	VietJet Air
25 Dec - 09 Jan	Bamboo Airways
28 Dec - 04 Jan	Xiamen Airlines
25 Dec - 01 Jan	VietJet Air
30 Dec - 06 Jan	VietJet Air
29 Dec - 05 Jan	VietJet Air
30 Dec - 07 Jan	AirAsia
26 Dec - 08 Jan	AirAsia
26 Dec - 31 Dec	VietJet Air
30 Dec - 03 Jan	Vietravel Airlines
25 Dec - 30 Dec	VietJet Air
26 Dec - 04 Jan	AirAsia
25 Dec - 31 Dec	AirAsia
25 Dec - 29 Dec	AirAsia
26 Dec - 31 Dec	Vietnam Airlines	direct

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.

Book a cheap hotel in Sydney

Cheap car rent in Sydney

Cheapest return flights from Hanoi to Sydney in December from $466

Return flights