Cheapest one-way flights from Portland to London in September from 232€

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

One-Way flights

20 Sep Frontier Airlines
26 Sep Frontier Airlines
14 Sep Frontier Airlines
16 Sep Hawaiian Airlines
21 Sep Frontier Airlines
17 Sep Frontier Airlines
15 Sep Frontier Airlines
03 Sep Alaska Airlines
07 Sep Frontier Airlines
19 Sep Frontier 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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