Flight Sheremetyevo International Airport departs from Moscow Sheremetyevo International Airport at 08:35 and arrives at Rome Leonardo da Vinci–Fiumicino Airport at 11:30.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 3133 Km. So the average speed is roughly 800 Km.
There is an 1 hour time difference between Moscow and Rome