Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 11:10 and arrives at Khon Kaen Khon Kaen Airport at 12:15.
The flighttime is about 1h 05m. The distance travelled ("as the bird flies"): 249 Km. So the average speed is roughly 230 Km.
The best day to arrive at Bangkok is Monday and it would be best to avoid Thursday, as prices are on average 100.48% higher than on Monday. (Average prices, based on 213923 datapoints.)
We have a lot more statistics for flights SL 644 and between Bangkok and Khon Kaen.
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