AirHint found the following cheapest one-way flights from Portland (PDX) to Mexico City (MEX) in December 2025 (see full year).
One-Way flights
| 04 Dec | Frontier Airlines | ||
| 08 Dec | Hawaiian Airlines | ||
| 18 Dec | Aeromexico | ||
| 15 Dec | Allegiant Air | ||
| 17 Dec | Hawaiian Airlines | ||
| 01 Dec | Hawaiian Airlines | ||
| 19 Dec | Hawaiian Airlines |
Also check the deals for return flights from Portland to Mexico City in December.
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