Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 13:05 and arrives at Bangkok Suvarnabhumi Airport at 16:35.
The flighttime is about 3h 30m. The distance travelled ("as the bird flies"): 830 Km. So the average speed is roughly 237 Km.
The best day to arrive at Jakarta is Friday and it would be best to avoid Thursday, as prices are on average 133.58% higher than on Friday. (Average prices, based on 48682145 datapoints.)
We have a lot more statistics for flights LH 9713 and between Jakarta and Bangkok.