Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 02:00 and arrives at Jakarta Soekarno–Hatta International Airport at 05:30.
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 Wednesday and it would be best to avoid Sunday, as prices are on average 53.81% higher than on Wednesday. (Average prices, based on 17230583 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 1026 datapoints.)
We have a lot more statistics for flights SL 116 and between Bangkok and Jakarta.