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

Return flights

17 Sep - 28 Sep	Copa
16 Sep - 22 Oct	LATAM Airlines Group
17 Sep - 24 Sep	Copa
25 Sep - 06 Oct	Copa
17 Sep - 01 Oct	Copa
13 Sep - 31 Oct	Copa
09 Sep - 16 Sep	Copa
16 Sep - 02 Oct	Copa
16 Sep - 01 Oct	Copa
23 Sep - 01 Oct	Copa
09 Sep - 07 Oct	Copa
25 Sep - 28 Sep	Copa
05 Sep - 12 Sep	Copa
05 Sep - 11 Oct	Qatar Airways
15 Sep - 17 Oct	Avianca
12 Sep - 19 Sep	Copa
12 Sep - 14 Sep	Copa
08 Sep - 15 Sep	LATAM Airlines Group
09 Sep - 14 Sep	LATAM Airlines Group
17 Sep - 19 Sep	Copa

Also check the deals for one-way flights from Sao Paulo 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 Sao Paulo to Sydney in September from $1621

Return flights