Flight Leonardo da Vinci–Fiumicino Airport departs from Rome Leonardo da Vinci–Fiumicino Airport at 13:55 and arrives at Moscow Moscow Domodedovo Airport at 19:45.
The flighttime is about 4h 50m. The distance travelled ("as the bird flies"): 3156 Km. So the average speed is roughly 653 Km.
There is an 1 hour time difference between Rome and Moscow