Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 06:35 and arrives at Tokyo Haneda Airport at 16:10.
The flighttime is about 7h 35m. The distance travelled ("as the bird flies"): 4285 Km. So the average speed is roughly 565 Km.
There is an 2 hour time difference between Jakarta and Tokyo
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Saturday, as prices are on average 29.27% higher than on Tuesday. (Average prices, based on 9760133 datapoints.)
We have a lot more statistics for flights JL 720 and between Jakarta and Tokyo.