Cheapest one-way flights from Ontario to Sao Paulo in September from $340

AirHint found the following cheapest one-way flights from Ontario (ONT) to Sao Paulo (GRU) in September 2025 (see full year).

One-Way flights

07 Sep Frontier Airlines
05 Sep Frontier Airlines
04 Sep Frontier Airlines
21 Sep Frontier Airlines
11 Sep Frontier Airlines
13 Sep Frontier Airlines
27 Sep Frontier Airlines
09 Sep Copa
06 Sep Copa
22 Sep Copa

Also check the deals for return flights from Ontario to Sao Paulo in September.

Skyscanner

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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