AirHint found the following cheapest return flights from Portland (PDX) to London (LGW) in October 2025 (see full year).
Return flights
| 28 Oct - 03 Nov | Alaska Airlines | ||
| 27 Oct - 02 Nov | Icelandair | ||
| 20 Oct - 22 Oct | Frontier Airlines | ||
| 26 Oct - 19 Nov | Hawaiian Airlines | ||
| 24 Oct - 31 Oct | Alaska Airlines |
Also check the deals for one-way flights from Portland to London in October.
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