Cheapest one-way flights from Portland to London in September from $208

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

One-Way flights

28 Sep Icelandair
27 Sep Icelandair
21 Sep Icelandair
19 Sep Sun Country Airlines
20 Sep Icelandair
03 Sep Hawaiian Airlines
23 Sep Hawaiian Airlines
21 Sep British Airways direct
28 Sep American Airlines direct
27 Sep British Airways direct

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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