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

Return flights

03 Sep - 10 Sep	Air India
01 Sep - 08 Sep	Air India
02 Sep - 07 Sep	Air India
03 Sep - 22 Sep	Air India
05 Sep - 11 Oct	Air India
12 Sep - 19 Sep	Air India
08 Sep - 21 Sep	Air India
29 Sep - 20 Oct	Air India Express
30 Sep - 12 Oct	IndiGo
01 Sep - 30 Sep	Air India
19 Sep - 29 Sep	Air India
18 Sep - 28 Sep	IndiGo
13 Sep - 27 Sep	Air India Express
22 Sep - 11 Oct	AirAsia
24 Sep - 26 Oct	AirAsia
24 Sep - 14 Oct	AirAsia
22 Sep - 12 Oct	AirAsia
26 Sep - 14 Oct	AirAsia
29 Sep - 14 Oct	AirAsia
24 Sep - 11 Oct	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 $442

Return flights