Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 20:00 and arrives at Phuket Phuket International Airport at 21:30.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 290 Km. So the average speed is roughly 193 Km.
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Friday, as prices are on average 45.17% higher than on Tuesday. (Average prices, based on 21674449 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 476 datapoints.)
We have a lot more statistics for flights VJ 312 and between Bangkok and Phuket.