AirHint found the following cheapest one-way flights from Portland (PDX) to London (LHR) in August 2025 (see full year).
One-Way flights
| 21 Aug | jetBlue | ||
| 31 Aug | Allegiant Air | ||
| 27 Aug | Air Canada | ||
| 21 Aug | British Airways | direct | |
| 17 Aug | British Airways | direct | |
| 31 Aug | British Airways | direct | |
| 28 Aug | Air Canada |
Also check the deals for return flights from Portland to London in August.
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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