Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 08:05 and arrives at Surat Thani Surat Thani International Airport at 09:15.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 187 Km. So the average speed is roughly 160 Km.
The best month to arrive at Bangkok is October and the most expensive month to fly is July. (Average prices, based on 1946 datapoints.)
We have a lot more statistics for flights DD 572 and between Bangkok and Surat Thani.
THB