Flight Xi'an Xianyang International Airport departs from Xi an Xi'an Xianyang International Airport at 20:15 and arrives at Dunhuang Dunhuang Airport at 22:40.
The flighttime is about 10h 25m. The distance travelled ("as the bird flies"): 1554 Km. So the average speed is roughly 149 Km.
There is an 8 hour time difference between Xi an and Dunhuang