Flight Phuket International Airport departs from Phuket Phuket International Airport at 18:15 and arrives at Shanghai Pudong International Airport at 00:15.
The flighttime is about 5h 00m. The distance travelled ("as the bird flies"): 2707 Km. So the average speed is roughly 541 Km.
There is an 1 hour time difference between Phuket and Shanghai