Flight Xi'an Xianyang International Airport departs from Xi an Xi'an Xianyang International Airport at 17:40 and arrives at Chiang Mai Chiang Mai International Airport at 20:05.
The flighttime is about 3h 25m. The distance travelled ("as the bird flies"): 1156 Km. So the average speed is roughly 338 Km.
There is an 1 hour time difference between Xi an and Chiang Mai