Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 20:40 and arrives at Chiang Mai Chiang Mai International Airport at 21:55.
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 Monday and it would be best to avoid Thursday, as prices are on average 69.99% higher than on Monday. (Average prices, based on 8420473 datapoints.)
We have a lot more statistics for flights H1 4766 and between Bangkok and Chiang Mai.