Flight Phuket International Airport departs from Phuket Phuket International Airport at 16:50 and arrives at Shenzhen Shenzhen Bao'an International Airport at 21:45.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 1767 Km. So the average speed is roughly 451 Km.
There is an 1 hour time difference between Phuket and Shenzhen