AirHint found the following cheapest return flights from Chicago (ORD) to Sao Paulo (GRU) in March 2026 (see full year).

Return flights

18 Mar - 25 Mar	Arajet
18 Mar - 26 Mar	Arajet
09 Mar - 18 Mar	Frontier Airlines
04 Mar - 11 Mar	Spirit Airlines
10 Mar - 18 Mar	Frontier Airlines
09 Mar - 16 Mar	Spirit Airlines
08 Mar - 18 Mar	Spirit Airlines
18 Mar - 27 Mar	Arajet
04 Mar - 13 Mar	Arajet
04 Mar - 14 Mar	Arajet
25 Mar - 07 Apr	Arajet
25 Mar - 06 Apr	Spirit Airlines
19 Mar - 01 Apr	Frontier Airlines
10 Mar - 10 Apr	Copa
30 Mar - 04 Apr	Arajet
26 Mar - 04 Apr	Frontier Airlines
27 Mar - 03 Apr	United	direct
19 Mar - 01 Apr	United	direct
25 Mar - 07 Apr	United	direct
09 Mar - 09 Apr	United	direct

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

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 March from 468€

Return flights