Flight Chiang Mai International Airport departs from Chiang Mai Chiang Mai International Airport at 20:20 and arrives at Bangkok Don Mueang International Airport at 21:30.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 204 Km. So the average speed is roughly 175 Km.
The best day to arrive at Chiang Mai is Monday and it would be best to avoid Sunday, as prices are on average 46.5% higher than on Monday. (Average prices, based on 6982204 datapoints.)
We have a lot more statistics for flights DD 141 and between Chiang Mai and Bangkok.