Flight Leonardo da Vinci–Fiumicino Airport departs from Rome Leonardo da Vinci–Fiumicino Airport at 09:40 and arrives at Doha International Airport at 16:05.
The flighttime is about 5h 25m. The distance travelled ("as the bird flies"): 4618 Km. So the average speed is roughly 853 Km.
There is an 1 hour time difference between Rome and Doha