Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 21:25 and arrives at Tokyo Narita International Airport at 06:50.
The flighttime is about 7h 25m. The distance travelled ("as the bird flies"): 4356 Km. So the average speed is roughly 587 Km.
There is an 2 hour time difference between Jakarta and Tokyo
The best month to arrive at Jakarta is July and the most expensive month to fly is April. (Average prices, based on 1079 datapoints.)
We have a lot more statistics for flights UA 7899 and between Jakarta and Tokyo.