Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 10:50 and arrives at Udon Thani Udon Thani International Airport at 12:00.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 255 Km. So the average speed is roughly 219 Km.
The best day to arrive at Bangkok is Friday and it would be best to avoid Sunday, as prices are on average 41.27% higher than on Friday. (Average prices, based on 407824 datapoints.)
We have a lot more statistics for flights SL 604 and between Bangkok and Udon Thani.