Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 08:00 and arrives at Chiang Mai Chiang Mai International Airport at 09:20.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 221 Km. So the average speed is roughly 166 Km.
The best day to arrive at Bangkok is Saturday and it would be best to avoid Tuesday, as prices are on average 142.28% higher than on Saturday. (Average prices, based on 13652068 datapoints.)
We have a lot more statistics for flights TG 5715 and between Bangkok and Chiang Mai.