AirHint found the following cheapest return flights from Portland (PDX) to Taipei (TPE) in December 2025 (see full year).
Return flights
| 30 Dec - 06 Jan | United | ||
| 28 Dec - 10 Jan | Alaska Airlines | ||
| 15 Dec - 04 Jan | Alaska Airlines | ||
| 14 Dec - 04 Jan | Delta |
Also check the deals for one-way flights from Portland to Taipei in December.
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