Flight Václav Havel Airport Prague departs from Prague Václav Havel Airport Prague at 23:25 and arrives at Moscow Sheremetyevo International Airport at 03:05.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 2639 Km. So the average speed is roughly 990 Km.
There is an 1 hour time difference between Prague and Moscow