Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 00:30 and arrives at Jakarta Soekarno–Hatta International Airport at 04:00.
The flighttime is about 3h 30m. The distance travelled ("as the bird flies"): 844 Km. So the average speed is roughly 241 Km.
The best day to arrive at Bangkok is Friday and it would be best to avoid Monday, as prices are on average 57.24% higher than on Friday. (Average prices, based on 12370013 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 350 datapoints.)
We have a lot more statistics for flights SL 116 and between Bangkok and Jakarta.