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

Return flights

28 Aug - 04 Sep	AirAsia
31 Aug - 07 Sep	AirAsia
27 Aug - 03 Sep	AirAsia
29 Aug - 05 Sep	IndiGo
30 Aug - 06 Sep	AirAsia
24 Aug - 31 Aug	IndiGo
26 Aug - 02 Sep	IndiGo
25 Aug - 01 Sep	IndiGo
20 Aug - 27 Aug	IndiGo
22 Aug - 29 Aug	IndiGo
27 Aug - 02 Sep	AirAsia
27 Aug - 04 Sep	AirAsia
27 Aug - 06 Sep	AirAsia
23 Aug - 30 Aug	AirAsia
25 Aug - 27 Aug	AirAsia
27 Aug - 29 Aug	AirAsia
25 Aug - 28 Aug	AirAsia
25 Aug - 29 Aug	AirAsia
21 Aug - 28 Aug	AirAsia
19 Aug - 26 Aug	AirAsia

Also check the deals for one-way flights from Colombo 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 Colombo to Sydney in August from $562

Return flights