Are there nonstop flights from Portland (PWM) to London (LHR)?

No. The fastest connection is via New York, about 8h 2m of total flying time.

What is the fastest connection from Portland (PWM) to London (LHR)?

via New York ≈ 8h 2m, via Newark ≈ 8h 5m, via Philadelphia ≈ 8h 23m (estimated flying time, excluding layovers).

from 23,000 JAL miles, from 27,500 ANA miles (economy, one way, based on the published award charts).

Portland International Jetport (PWM) to London Heathrow Airport (LHR)・5,110 km

No nonstop flights. The fastest connection is via New York (JFK), about 8h 2m of flying time (layover not included).

With milesJAL 23,000 miles+ (via PHL)ANA 27,500 miles+ (via EWR)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

19 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.