Are there nonstop flights from Rome (FCO) to Phoenix (PHX)?

No. The fastest connection is via Denver, about 12h 38m of total flying time.

What is the fastest connection from Rome (FCO) to Phoenix (PHX)?

via Denver ≈ 12h 38m, via Paris ≈ 12h 39m, via London ≈ 12h 39m (estimated flying time, excluding layovers).

from 27,500 ANA miles, from 40,000 JAL miles (economy, one way, based on the published award charts).

Rome–Fiumicino Leonardo da Vinci International Airport (FCO) to Phoenix Sky Harbor International Airport (PHX)・9,898 km

No nonstop flights. The fastest connection is via Denver (DEN), about 12h 38m of flying time (layover not included).

With milesANA 27,500 miles+ (via DEN)JAL 40,000 miles+ (via LHR)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

24 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.