Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 12:10 and arrives at Chiang Mai Chiang Mai International Airport at 13:25.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 221 Km. So the average speed is roughly 177 Km.
The best day to arrive at Bangkok is Friday and it would be best to avoid Thursday, as prices are on average 43.56% higher than on Friday. (Average prices, based on 8358368 datapoints.)
We have a lot more statistics for flights H1 4744 and between Bangkok and Chiang Mai.