Flight Sheremetyevo International Airport departs from Moscow Sheremetyevo International Airport at 12:10 and arrives at Barcelona Barcelona–El Prat Airport at 15:40.
The flighttime is about 4h 30m. The distance travelled ("as the bird flies"): 4206 Km. So the average speed is roughly 935 Km.
There is an 1 hour time difference between Moscow and Barcelona