Flight Phuket International Airport departs from Phuket Phuket International Airport at 23:15 and arrives at Guangzhou Guangzhou Baiyun International Airport at 03:50.
The flighttime is about 3h 35m. The distance travelled ("as the bird flies"): 1716 Km. So the average speed is roughly 479 Km.
There is an 1 hour time difference between Phuket and Guangzhou