Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 15:35 and arrives at Krabi Krabi International Airport at 16:55.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 223 Km. So the average speed is roughly 167 Km.
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Thursday, as prices are on average 74.08% higher than on Tuesday. (Average prices, based on 1050945 datapoints.)
We have a lot more statistics for flights WE 253 and between Bangkok and Krabi.