Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 06:15 and arrives at Hat Yai Hat Yai International Airport at 07:45.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 143 Km. So the average speed is roughly 95 Km.
The best day to arrive at Bangkok is Friday and it would be best to avoid Tuesday, as prices are on average 32.6% higher than on Friday. (Average prices, based on 3222641 datapoints.)
We have a lot more statistics for flights SL 702 and between Bangkok and Hat Yai.