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

Return flights

09 Sep - 24 Sep	Air Canada
29 Sep - 06 Oct	Porter Airlines (Canada) Ltd
09 Sep - 30 Sep	Porter Airlines (Canada) Ltd
12 Sep - 19 Sep	Porter Airlines (Canada) Ltd
06 Sep - 20 Sep	Air Canada
07 Sep - 10 Sep	Air Canada
09 Sep - 10 Sep	Air Canada
06 Sep - 13 Sep	Porter Airlines (Canada) Ltd
11 Sep - 21 Sep	Porter Airlines (Canada) Ltd
02 Sep - 09 Sep	Porter Airlines (Canada) Ltd
06 Sep - 11 Sep	Porter Airlines (Canada) Ltd
25 Sep - 16 Oct	Air Canada

Also check the deals for one-way flights from Toronto to Sao Paulo 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 Toronto to Sao Paulo in September from 603€

Return flights