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

Return flights

29 Jul - 01 Aug	Volaris
29 Jul - 12 Aug	United
30 Jul - 13 Aug	United
14 Jul - 28 Jul	United
15 Jul - 29 Jul	United
16 Jul - 30 Jul	United
22 Jul - 05 Aug	United
23 Jul - 06 Aug	United
24 Jul - 07 Aug	United
21 Jul - 04 Aug	United
28 Jul - 11 Aug	United
25 Jul - 08 Aug	United
13 Jul - 27 Jul	United
20 Jul - 03 Aug	United
17 Jul - 31 Jul	United
12 Jul - 24 Jul	LATAM Airlines Group
12 Jul - 26 Jul	United
12 Jul - 20 Jul	LATAM Airlines Group
15 Jul - 22 Jul	LATAM Airlines Group
14 Jul - 24 Jul	Volaris

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

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 Ontario to Sao Paulo in July from $1034

Return flights