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

Return flights

23 Dec - 12 Jan	AirAsia
23 Dec - 18 Jan	AirAsia
19 Dec - 14 Jan	AirAsia
16 Dec - 12 Jan	AirAsia
17 Dec - 12 Jan	Scoot
08 Dec - 15 Jan	AirAsia
09 Dec - 15 Jan	AirAsia
22 Dec - 16 Jan	HK Express
09 Dec - 15 Jan	Hong Kong Airlines	direct
26 Dec - 13 Jan	Hainan Airlines
13 Dec - 21 Dec	Hainan Airlines
11 Dec - 18 Dec	Hainan Airlines
12 Dec - 21 Dec	Hainan Airlines
07 Dec - 13 Dec	Hainan Airlines
17 Dec - 31 Dec	Scoot
09 Dec - 12 Dec	AirAsia
12 Dec - 31 Dec	AirAsia
07 Dec - 11 Dec	Hainan Airlines
23 Dec - 26 Dec	AirAsia
20 Dec - 29 Dec	AirAsia

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 331€

Return flights