Flight Surat Thani International Airport departs from Surat Thani Surat Thani International Airport at 15:00 and arrives at Bangkok Suvarnabhumi Airport at 16:10.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 200 Km. So the average speed is roughly 171 Km.
The best day to arrive at Surat Thani is Monday and it would be best to avoid Friday, as prices are on average 78.99% higher than on Monday. (Average prices, based on 84698 datapoints.)
We have a lot more statistics for flights DD 575 and between Surat Thani and Bangkok.