Flight Narita International Airport departs from Tokyo Narita International Airport at 17:50 and arrives at Jakarta Soekarno–Hatta International Airport at 23:45.
The flighttime is about 7h 55m. The distance travelled ("as the bird flies"): 4356 Km. So the average speed is roughly 550 Km.
There is an 2 hour time difference between Tokyo and Jakarta
The best day to arrive at Tokyo is Sunday and it would be best to avoid Monday, as prices are on average 68.79% higher than on Sunday. (Average prices, based on 8137128 datapoints.)
We have a lot more statistics for flights AC 835 and between Tokyo and Jakarta.