Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 19:00 and arrives at Khon Kaen Khon Kaen Airport at 20:05.
The flighttime is about 1h 05m. The distance travelled ("as the bird flies"): 249 Km. So the average speed is roughly 230 Km.
The best month to arrive at Bangkok is September and the most expensive month to fly is July. (Average prices, based on 1535 datapoints.)
We have a lot more statistics for flights FD 8040 and between Bangkok and Khon Kaen.