Cheapest return flights from Ontario to Sao Paulo in October from $724

AirHint found the following cheapest return flights from Ontario (ONT) to Sao Paulo (GRU) in October 2025 (see full year).

Return flights

12 Oct - 19 Oct Frontier Airlines
21 Oct - 28 Oct Avianca
25 Oct - 04 Nov Avianca
24 Oct - 31 Oct LATAM Airlines Group
18 Oct - 02 Nov LATAM Airlines Group
03 Oct - 08 Oct LATAM Airlines Group
17 Oct - 31 Oct LATAM Airlines Group

Also check the deals for one-way flights from Ontario to Sao Paulo in October.

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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