Flight Phuket International Airport departs from Phuket Phuket International Airport at 09:15 and arrives at Delhi Indira Gandhi International Airport at 12:20.
The flighttime is about 4h 35m. The distance travelled ("as the bird flies"): 2321 Km. So the average speed is roughly 506 Km.
There is an 1.5 hour time difference between Phuket and Delhi