Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 14:20 and arrives at Jakarta Soekarno–Hatta International Airport at 17:55.
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 Thursday and it would be best to avoid Sunday, as prices are on average 52.87% higher than on Thursday. (Average prices, based on 13267077 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 666 datapoints.)
We have a lot more statistics for flights TG 435 and between Bangkok and Jakarta.