Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 14:20 and arrives at Chiang Mai Chiang Mai International Airport at 15:35.
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 Saturday and it would be best to avoid Thursday, as prices are on average 32.15% higher than on Saturday. (Average prices, based on 7917519 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 136 datapoints.)
We have a lot more statistics for flights H1 4750 and between Bangkok and Chiang Mai.