Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 11:40 and arrives at Surat Thani Surat Thani International Airport at 12:55.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 187 Km. So the average speed is roughly 150 Km.
The best day to arrive at Bangkok is Monday and it would be best to avoid Saturday, as prices are on average 51.38% higher than on Monday. (Average prices, based on 721238 datapoints.)
We have a lot more statistics for flights FD 3239 and between Bangkok and Surat Thani.