Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 14:10 and arrives at Jakarta Soekarno–Hatta International Airport at 17:45.
The flighttime is about 3h 35m. The distance travelled ("as the bird flies"): 830 Km. So the average speed is roughly 232 Km.
The best day to arrive at Bangkok is Monday and it would be best to avoid Sunday, as prices are on average 28.2% higher than on Monday. (Average prices, based on 13116414 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 621 datapoints.)
We have a lot more statistics for flights GA 867 and between Bangkok and Jakarta.