AirHint found the following cheapest return flights from Chicago (ORD) to Sao Paulo (GRU) in August 2025 (see full year).

Return flights

12 Aug - 19 Aug	Frontier Airlines
12 Aug - 24 Aug	Frontier Airlines
15 Aug - 30 Aug	Spirit Airlines
27 Aug - 04 Sep	Spirit Airlines
07 Aug - 14 Aug	Spirit Airlines
29 Aug - 07 Sep	Frontier Airlines
29 Aug - 06 Sep	Frontier Airlines
01 Aug - 07 Aug	LATAM Airlines Group
01 Aug - 17 Aug	Avianca
18 Aug - 01 Sep	United	direct
19 Aug - 02 Sep	United	direct
20 Aug - 03 Sep	United	direct
27 Aug - 04 Sep	United	direct
21 Aug - 04 Sep	United
26 Aug - 09 Sep	United
27 Aug - 10 Sep	United
07 Aug - 21 Aug	United	direct
04 Aug - 18 Aug	United	direct
13 Aug - 27 Aug	United	direct
01 Aug - 17 Aug	United	direct

Also check the deals for one-way flights from Chicago to Sao Paulo in August.

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 Chicago to Sao Paulo in August from $573

Return flights