Cheapest one-way flights from Portland to London in September from $241

AirHint found the following cheapest one-way flights from Portland (PDX) to London (LGW) in September 2025 (see full year).

One-Way flights

25 Sep Frontier Airlines
05 Sep Frontier Airlines
26 Sep Spirit Airlines
10 Sep Spirit Airlines
15 Sep Spirit Airlines
04 Sep Spirit Airlines
14 Sep Icelandair
20 Sep Frontier Airlines
27 Sep Alaska Airlines
03 Sep Hawaiian Airlines

Also check the deals for return flights from Portland to London in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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