AirHint found the following cheapest one-way flights from Portland (PDX) to London (LGW) in December 2025 (see full year).
One-Way flights
| 05 Dec | Frontier Airlines | ||
| 10 Dec | Hawaiian Airlines | ||
| 16 Dec | Icelandair | ||
| 18 Dec | Hawaiian Airlines | ||
| 19 Dec | Hawaiian Airlines |
Also check the deals for return flights from Portland to London in December.
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