Flight Mae Fah Luang Chiang Rai International Airport departs from Chiang Rai Mae Fah Luang Chiang Rai International Airport at 18:55 and arrives at Bangkok Suvarnabhumi Airport at 20:25.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 158 Km. So the average speed is roughly 105 Km.
The best day to arrive at Chiang Rai is Sunday and it would be best to avoid Wednesday, as prices are on average 126.85% higher than on Sunday. (Average prices, based on 253697 datapoints.)
We have a lot more statistics for flights TG 137 and between Chiang Rai and Bangkok.