AirHint found the following cheapest return flights from Portland (PDX) to Sao Paulo (GRU) in December 2026 (see full year).
Return flights
| 28 Dec - 02 Jan | Delta | ||
| 28 Dec - 04 Jan | United | ||
| 28 Dec - 03 Jan | Alaska Airlines | ||
| 29 Dec - 04 Jan | United |
Also check the deals for one-way flights from Portland to Sao Paulo in December.
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