Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 18:40 and arrives at Chiang Mai Chiang Mai International Airport at 19:55.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 204 Km. So the average speed is roughly 163 Km.
The best day to arrive at Bangkok is Thursday and it would be best to avoid Wednesday, as prices are on average 46.66% higher than on Thursday. (Average prices, based on 14855817 datapoints.)
We have a lot more statistics for flights FD 8431 and between Bangkok and Chiang Mai.