Flight Václav Havel Airport Prague departs from Prague Václav Havel Airport Prague at 13:15 and arrives at Moscow Sheremetyevo International Airport at 18:10.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 2639 Km. So the average speed is roughly 674 Km.
There is an 1 hour time difference between Prague and Moscow