Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 11:50 and arrives at Phuket Phuket International Airport at 14:50.
The flighttime is about 4h 00m. The distance travelled ("as the bird flies"): 1776 Km. So the average speed is roughly 444 Km.
There is an 1 hour time difference between Hong Kong and Phuket