Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 09:30 and arrives at Phuket Phuket International Airport at 11:00.
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 Thursday and it would be best to avoid Wednesday, as prices are on average 106.22% higher than on Thursday. (Average prices, based on 21625042 datapoints.)
We have a lot more statistics for flights TG 285 and between Bangkok and Phuket.