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

Return flights

27 Aug - 09 Sep	AirAsia
28 Aug - 09 Sep	AirAsia
27 Aug - 02 Sep	AirAsia
28 Aug - 04 Sep	AirAsia
28 Aug - 02 Sep	AirAsia
27 Aug - 16 Sep	AirAsia
25 Aug - 08 Sep	AirAsia
27 Aug - 06 Sep	AirAsia
26 Aug - 08 Sep	AirAsia
28 Aug - 05 Sep	AirAsia
26 Aug - 28 Aug	AirAsia
28 Aug - 31 Aug	AirAsia
21 Aug - 29 Aug	AirAsia
20 Aug - 26 Aug	Scoot
19 Aug - 26 Aug	Scoot
19 Aug - 31 Aug	AirAsia
21 Aug - 31 Aug	AirAsia
21 Aug - 28 Aug	AirAsia
19 Aug - 24 Aug	AirAsia
21 Aug - 24 Aug	AirAsia

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 $383

Return flights