Are there nonstop flights from Greensboro (GSO) to Portland (PWM)?

No. The fastest connection is via Philadelphia, about 2h 22m of total flying time.

What is the fastest connection from Greensboro (GSO) to Portland (PWM)?

via Philadelphia ≈ 2h 22m, via Washington ≈ 2h 23m, via Newark ≈ 2h 23m (estimated flying time, excluding layovers).

from 12,000 JAL miles (economy, one way, based on the published award charts).

Piedmont Triad International Airport (GSO) to Portland International Jetport (PWM)・1,173 km

No nonstop flights. The fastest connection is via Philadelphia (PHL), about 2h 22m of flying time (layover not included).

With milesJAL 12,000 miles+ (via CLT)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

10 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.