Are there nonstop flights from Rome (FCO) to Fayetteville/Springdale/Rogers (XNA)?

No. The fastest connection is via Detroit, about 11h 5m of total flying time.

What is the fastest connection from Rome (FCO) to Fayetteville/Springdale/Rogers (XNA)?

via Detroit ≈ 11h 5m, via Chicago ≈ 11h 5m, via Newark ≈ 11h 14m (estimated flying time, excluding layovers).

from 27,500 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Rome–Fiumicino Leonardo da Vinci International Airport (FCO) to Northwest Arkansas National Airport (XNA)・8,573 km

No nonstop flights. The fastest connection is via Detroit (DTW), about 11h 5m of flying time (layover not included).

With milesANA 27,500 miles+ (via DEN)JAL 37,000 miles+ (via CLT)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

12 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.