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

Return flights

28 Oct - 11 Nov	Thai AirAsia
21 Oct - 28 Oct	AirAsia
21 Oct - 29 Oct	Thai AirAsia
20 Oct - 24 Oct	Thai AirAsia
16 Oct - 25 Oct	AirAsia
30 Oct - 09 Nov	AirAsia
31 Oct - 09 Nov	AirAsia
20 Oct - 28 Oct	Thai AirAsia
26 Oct - 09 Nov	Thai AirAsia
28 Oct - 04 Nov	Thai AirAsia
20 Oct - 26 Oct	Thai AirAsia
23 Oct - 08 Nov	Thai AirAsia
29 Oct - 08 Nov	Thai AirAsia
24 Oct - 07 Nov	Thai AirAsia
16 Oct - 21 Oct	Thai AirAsia
26 Oct - 02 Nov	Thai AirAsia
22 Oct - 27 Oct	Thai AirAsia
21 Oct - 25 Oct	Thai AirAsia
21 Oct - 04 Nov	Thai AirAsia
23 Oct - 29 Oct	Thai AirAsia

Also check the deals for one-way flights from Bangkok to Sydney in October.

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 October from $401

Return flights