Flight Incheon International Airport departs from Seoul Incheon International Airport at 10:25 and arrives at Tashkent International Airport at 13:35.
The flighttime is about 7h 10m. The distance travelled ("as the bird flies"): 6353 Km. So the average speed is roughly 886 Km.
There is an 4 hour time difference between Seoul and Tashkent