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

Return flights

19 Aug - 27 Aug	AirAsia
15 Aug - 18 Aug	AirAsia
26 Aug - 03 Sep	AirAsia
31 Aug - 07 Sep	Thai AirAsia
14 Aug - 21 Aug	AirAsia
12 Aug - 28 Aug	AirAsia
15 Aug - 21 Aug	AirAsia
11 Aug - 18 Aug	AirAsia
11 Aug - 28 Aug	AirAsia
12 Aug - 17 Aug	AirAsia
12 Aug - 20 Aug	AirAsia
18 Aug - 21 Aug	Thai Lion Air
26 Aug - 09 Sep	Thai AirAsia
25 Aug - 09 Sep	AirAsia
26 Aug - 07 Sep	Thai AirAsia
25 Aug - 07 Sep	AirAsia
19 Aug - 07 Sep	Thai AirAsia
26 Aug - 05 Sep	Thai AirAsia
15 Aug - 05 Sep	AirAsia
25 Aug - 05 Sep	AirAsia

Also check the deals for one-way flights from Bangkok 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 Bangkok to Sydney in August from $398

Return flights