Are there nonstop flights from Houston (IAH) to Rome (FCO)?

Yes. ITA Airways fly this route. Flight time is about 11h 14m.

What is the fastest connection from Houston (IAH) to Rome (FCO)?

via Montréal ≈ 11h 45m, via Boston ≈ 11h 45m, via Newark ≈ 11h 45m (estimated flying time, excluding layovers).

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

George Bush Intercontinental Airport (IAH) to Rome–Fiumicino Leonardo da Vinci International Airport (FCO)・9,126 km

Nonstop flights available (1 airline). Flight time about 11h 14m. Nonstop return flights also operate.

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

31 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.