AirHint found the following cheapest return flights from Bangkok (DMK) to Perth (PER) in September 2025 (see full year).

Return flights

27 Sep - 04 Oct	AirAsia
25 Sep - 29 Sep	Batik Air Malaysia
10 Sep - 17 Sep	AirAsia
24 Sep - 29 Sep	AirAsia
11 Sep - 09 Oct	Thai Lion Air
24 Sep - 02 Oct	AirAsia
24 Sep - 03 Oct	AirAsia
23 Sep - 29 Sep	AirAsia
22 Sep - 29 Sep	Thai AirAsia
23 Sep - 02 Oct	AirAsia
23 Sep - 01 Oct	AirAsia
22 Sep - 02 Oct	Thai AirAsia
22 Sep - 01 Oct	Thai AirAsia
09 Sep - 13 Sep	Thai Lion Air
19 Sep - 21 Sep	Thai Lion Air
23 Sep - 03 Oct	AirAsia
22 Sep - 03 Oct	Thai AirAsia
17 Sep - 21 Sep	Nok Air
26 Sep - 29 Sep	AirAsia
27 Sep - 29 Sep	AirAsia

Also check the deals for one-way flights from Bangkok to Perth in September.

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 Perth in September from 229€

Return flights