Flight Sheremetyevo International Airport departs from Moscow Sheremetyevo International Airport at 18:50 and arrives at Phuket Phuket International Airport at 08:30.
The flighttime is about 9h 40m. The distance travelled ("as the bird flies"): 6492 Km. So the average speed is roughly 672 Km.
There is an 4 hour time difference between Moscow and Phuket