Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 16:15 and arrives at Surat Thani Surat Thani International Airport at 17:30.
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 70.3% higher than on Monday. (Average prices, based on 721195 datapoints.)
We have a lot more statistics for flights FD 3331 and between Bangkok and Surat Thani.