AirHint found the following cheapest one-way flights from Portland (PDX) to Rome (FCO) in December 2025 (see full year).
One-Way flights
| 01 Dec | Icelandair | ||
| 12 Dec | Air France | ||
| 05 Dec | Air France | ||
| 15 Dec | Alaska Airlines | ||
| 04 Dec | Air France | ||
| 18 Dec | United |
Also check the deals for return flights from Portland to Rome in December.
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