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

Return flights

08 Dec - 11 Jan	Sichuan Airlines
08 Dec - 15 Jan	Scoot
23 Dec - 06 Jan	Hainan Airlines
20 Dec - 08 Jan	Hainan Airlines
18 Dec - 18 Jan	Hong Kong Airlines	direct
31 Dec - 24 Jan	Hainan Airlines
13 Dec - 23 Jan	Scoot
13 Dec - 19 Jan	Scoot
01 Dec - 15 Jan	Qantas	direct
12 Dec - 01 Jan	Hainan Airlines
23 Dec - 28 Dec	Hainan Airlines
20 Dec - 25 Dec	Hainan Airlines
17 Dec - 24 Dec	Hainan Airlines
12 Dec - 28 Dec	Hainan Airlines
17 Dec - 21 Dec	Hainan Airlines
04 Dec - 07 Dec	HK Express
11 Dec - 28 Dec	AirAsia
01 Dec - 06 Dec	Cebu Pacific
02 Dec - 05 Dec	AirAsia
09 Dec - 16 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 386€

Return flights