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 20:15.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 158 Km. So the average speed is roughly 118 Km.
The best day to arrive at Chiang Rai is Tuesday and it would be best to avoid Friday, as prices are on average 218.6% higher than on Tuesday. (Average prices, based on 80106 datapoints.)
We have a lot more statistics for flights TG 137 and between Chiang Rai and Bangkok.