AirHint found the following cheapest return flights from Fresno (FAT) to Sao Paulo (GRU) in December 2025 (see full year).
Return flights
| 22 Dec - 10 Jan | Allegiant Air | ||
| 20 Dec - 10 Jan | Allegiant Air | ||
| 21 Dec - 10 Jan | Allegiant Air | ||
| 20 Dec - 27 Dec | Allegiant Air |
Also check the deals for one-way flights from Fresno to Sao Paulo in December.
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