Portland International (PDX) to Heathrow (LHR).
| Departure | Return | Price |
|---|---|---|
| 08/05/2026 | 08/11/2026 | $928 |
| 08/05/2026 | 08/12/2026 | $928 |
| 08/05/2026 | 08/13/2026 | $928 |
| 08/05/2026 | 08/14/2026 | $962 |
| 08/04/2026 | 08/12/2026 | $1028 |
| 08/02/2026 | 08/11/2026 | $1085 |
| 08/03/2026 | 08/11/2026 | $1085 |
| 08/03/2026 | 08/12/2026 | $1085 |
| 08/04/2026 | 08/11/2026 | $1085 |
| 08/04/2026 | 08/13/2026 | $1085 |
Based on current fares, August is the cheapest month to fly from Portland to London, with average fares around $1080 round trip (as low as $928).
June tends to be more expensive, averaging $1343.
See the full month-by-month and day-of-week price analysis
Best Time to Fly PDX → LHRDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Portland to London is August, with average round-trip fares around $1080. Fares in August start as low as $928. The most expensive month is June, averaging $1343.
A nonstop flight from Portland to London takes approximately 10h.
The cheapest flight from Portland to London currently starts at $928 round trip in economy class.
The average round-trip flight price from Portland to London is $1316 in economy class.
The distance is 4854 miles (7810 km). with a nonstop flight time of about 10h. The lowest fare currently available is $928 departing in August. The average round-trip fare is $1316.
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