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

Return flights

27 Aug - 01 Sep	AirAsia
04 Aug - 14 Aug	AirAsia
11 Aug - 26 Aug	AirAsia
12 Aug - 26 Aug	AirAsia
12 Aug - 19 Aug	AirAsia
04 Aug - 09 Aug	AirAsia
12 Aug - 14 Aug	AirAsia
11 Aug - 21 Aug	AirAsia
08 Aug - 12 Aug	AirAsia
08 Aug - 16 Aug	AirAsia
13 Aug - 19 Aug	AirAsia
11 Aug - 08 Sep	AirAsia
27 Aug - 10 Sep	AirAsia
12 Aug - 23 Sep	Scoot Tigerair
27 Aug - 09 Sep	Scoot Tigerair
27 Aug - 02 Sep	Scoot Tigerair
27 Aug - 05 Sep	Scoot Tigerair
19 Aug - 02 Sep	AirAsia
27 Aug - 01 Sep	Hong Kong Airlines	direct
06 Aug - 05 Sep	Scoot Tigerair

Also check the deals for one-way flights from Hong Kong to Sydney in August.

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 August from $380

Return flights