Cheapest return flights from Portland to London in August from 809€

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

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

Return flights

21 Aug - 28 Aug Icelandair
12 Aug - 25 Aug Air Canada
12 Aug - 25 Aug British Airways direct
31 Aug - 07 Sep Icelandair
04 Aug - 18 Aug Air Canada
04 Aug - 11 Aug Air Canada
01 Aug - 08 Aug United
11 Aug - 18 Aug United
04 Aug - 18 Aug Iberia direct
04 Aug - 11 Aug Iberia direct

Also check the deals for one-way 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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