Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 08:50 and arrives at Phuket Phuket International Airport at 10:15.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 290 Km. So the average speed is roughly 205 Km.
The best day to arrive at Bangkok is Monday and it would be best to avoid Saturday, as prices are on average 93.66% higher than on Monday. (Average prices, based on 21442098 datapoints.)
We have a lot more statistics for flights VZ 300 and between Bangkok and Phuket.