AirHint found the following cheapest one-way flights from Chicago (ORD) to Sao Paulo (GRU) in October 2025 (see full year).
One-Way flights
| 25 Oct | Spirit Airlines | ||
| 20 Oct | Spirit Airlines | ||
| 24 Oct | Frontier Airlines | ||
| 16 Oct | Copa | ||
| 18 Oct | Copa | ||
| 19 Oct | Copa |
Also check the deals for return flights from Chicago to Sao Paulo in October.
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