AirHint found the following cheapest return flights from Portland (PDX) to Buenos Aires (EZE) in December 2025 (see full year).
Return flights
| 02 Dec - 09 Dec | LATAM Airlines Group | ||
| 04 Dec - 28 Dec | United | ||
| 16 Dec - 31 Dec | Hawaiian Airlines | ||
| 28 Dec - 04 Jan | Hawaiian Airlines | ||
| 29 Dec - 04 Jan | Hawaiian Airlines | ||
| 18 Dec - 08 Jan | Delta |
Also check the deals for one-way flights from Portland to Buenos Aires in December.
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