Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 20:30 and arrives at Phuket Phuket International Airport at 21:55.
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 Thursday and it would be best to avoid Sunday, as prices are on average 11.2% higher than on Thursday. (Average prices, based on 21572826 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 143 datapoints.)
We have a lot more statistics for flights H1 4740 and between Bangkok and Phuket.