Flight Helsinki Vantaa Airport departs from Helsinki Helsinki Vantaa Airport at 17:30 and arrives at Phuket Phuket International Airport at 10:00.
The flighttime is about 12h 30m. The distance travelled ("as the bird flies"): 7816 Km. So the average speed is roughly 625 Km.
There is an 4 hour time difference between Helsinki and Phuket