Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 13:50 and arrives at Chiang Mai Chiang Mai International Airport at 15:15.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 221 Km. So the average speed is roughly 156 Km.
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Friday, as prices are on average 83.97% higher than on Tuesday. (Average prices, based on 10570118 datapoints.)
We have a lot more statistics for flights VZ 4750 and between Bangkok and Chiang Mai.