AirHint found the following cheapest return flights from Bangalore (BLR) to Sydney (SYD) in September 2025 (see full year).

Return flights

22 Sep - 29 Sep	Thai Lion Air
30 Sep - 07 Oct	IndiGo
22 Sep - 17 Oct	AirAsia
24 Sep - 22 Oct	AirAsia
24 Sep - 17 Oct	AirAsia
24 Sep - 15 Oct	AirAsia
29 Sep - 05 Oct	Air India
30 Sep - 06 Oct	Air India
25 Sep - 07 Oct	SriLankan Airlines
22 Sep - 12 Oct	AirAsia
30 Sep - 05 Oct	Air India
22 Sep - 24 Sep	AirAsia
22 Sep - 25 Sep	AirAsia
22 Sep - 30 Sep	AirAsia
24 Sep - 30 Sep	AirAsia
19 Sep - 24 Sep	AirAsia
19 Sep - 25 Sep	AirAsia
19 Sep - 30 Sep	AirAsia
23 Sep - 30 Sep	Thai Airways
19 Sep - 21 Sep	AirAsia

Also check the deals for one-way flights from Bangalore to Sydney 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 Bangalore to Sydney in September from $728

Return flights