AirHint found the following cheapest one-way flights from Boston (BOS) to Sao Paulo (GRU) in December 2025 (see full year).
One-Way flights
| 08 Dec | Frontier Airlines | ||
| 02 Dec | Frontier Airlines | ||
| 06 Dec | Spirit Airlines | ||
| 03 Dec | Copa | ||
| 04 Dec | Copa | ||
| 31 Dec | Copa | ||
| 09 Dec | Copa | ||
| 07 Dec | Delta | ||
| 05 Dec | Frontier Airlines | ||
| 30 Dec | United |
Also check the deals for return flights from Boston to Sao Paulo in December.
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