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

Return flights

04 Dec - 25 Jan	AirAsia
02 Dec - 25 Jan	VietJet Air
08 Dec - 20 Jan	AirAsia
09 Dec - 12 Jan	AirAsia
03 Dec - 15 Jan	Scoot
08 Dec - 16 Jan	Scoot
04 Dec - 16 Jan	Scoot
11 Dec - 15 Jan	Scoot
02 Dec - 08 Jan	VietJet Air
24 Dec - 08 Jan	Hainan Airlines
03 Dec - 07 Dec	Cebu Pacific
04 Dec - 10 Dec	AirAsia
04 Dec - 09 Dec	AirAsia
01 Dec - 07 Dec	HK Express
12 Dec - 28 Dec	AirAsia
01 Dec - 05 Dec	HK Express
05 Dec - 08 Dec	HK Express
01 Dec - 06 Dec	Cebu Pacific
21 Dec - 29 Dec	HK Express
16 Dec - 31 Dec	Scoot

Also check the deals for one-way flights from Hong Kong 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 Hong Kong to Sydney in December from 309€

Return flights