Cheapest one-way flights from Portland to London in August from $269

Best time to book flights for Portland (PDX) to London (LHR) flights at AirHint

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

One-Way flights

24 Aug Icelandair
20 Aug Icelandair
22 Aug Icelandair
14 Aug Icelandair
05 Aug Hawaiian Airlines
24 Aug British Airways direct
17 Aug Delta
18 Aug Delta
20 Aug British Airways direct
05 Aug British Airways direct

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

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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