Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 07:05 and arrives at Surat Thani Surat Thani International Airport at 08:20.
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 Sunday and it would be best to avoid Monday, as prices are on average 63.61% higher than on Sunday. (Average prices, based on 774092 datapoints.)
We have a lot more statistics for flights SL 734 and between Bangkok and Surat Thani.