Flight Chiang Mai International Airport departs from Chiang Mai Chiang Mai International Airport at 08:45 and arrives at Shanghai Pudong International Airport at 13:45.
The flighttime is about 4h 00m. The distance travelled ("as the bird flies"): 2571 Km. So the average speed is roughly 643 Km.
There is an 1 hour time difference between Chiang Mai and Shanghai