Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 21:00 and arrives at Chiang Mai Chiang Mai International Airport at 22:10.
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 Bangkok is Thursday and it would be best to avoid Saturday, as prices are on average 186.62% higher than on Thursday. (Average prices, based on 14970964 datapoints.)
We have a lot more statistics for flights DD 148 and between Bangkok and Chiang Mai.