Flight Sheremetyevo International Airport departs from Moscow Sheremetyevo International Airport at 06:20 and arrives at Yerevan Zvartnots International Airport at 10:10.
The flighttime is about 2h 50m. The distance travelled ("as the bird flies"): 1536 Km. So the average speed is roughly 542 Km.
There is an 1 hour time difference between Moscow and Yerevan