AirHint found the following cheapest return flights from Boston (BOS) to Sao Paulo (GRU) in October 2026 (see full year).
Return flights
| 11 Oct - 21 Oct | Delta | direct | |
| 07 Oct - 25 Oct | Delta | direct | |
| 10 Oct - 20 Oct | Copa | ||
| 06 Oct - 24 Oct | Copa | ||
| 01 Oct - 14 Oct | Copa | ||
| 01 Oct - 14 Oct | Delta | direct |
Also check the deals for one-way flights from Boston to Sao Paulo in October.
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