AirHint found the following cheapest one-way flights from Portland (PDX) to San Jose (SJO) in December 2025 (see full year).
One-Way flights
| 06 Dec | Delta | ||
| 10 Dec | United | ||
| 27 Dec | Alaska Airlines | ||
| 24 Dec | Copa | ||
| 26 Dec | United |
Also check the deals for return flights from Portland to San Jose in December.
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