Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 18:30 and arrives at Chiang Mai Chiang Mai International Airport at 19:50.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 204 Km. So the average speed is roughly 153 Km.
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Friday, as prices are on average 77.54% higher than on Tuesday. (Average prices, based on 14809390 datapoints.)
We have a lot more statistics for flights DD 140 and between Bangkok and Chiang Mai.
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