Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 18:00 and arrives at Phuket Phuket International Airport at 19:25.
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 Wednesday and it would be best to avoid Friday, as prices are on average 29.33% higher than on Wednesday. (Average prices, based on 21839484 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 489 datapoints.)
We have a lot more statistics for flights H1 4738 and between Bangkok and Phuket.