Flight Narita International Airport departs from Tokyo Narita International Airport at 11:15 and arrives at Jakarta Soekarno–Hatta International Airport at 17:05.
The flighttime is about 7h 50m. The distance travelled ("as the bird flies"): 4356 Km. So the average speed is roughly 556 Km.
There is an 2 hour time difference between Tokyo and Jakarta
The best month to arrive at Tokyo is September and the most expensive month to fly is January. (Average prices, based on 425 datapoints.)
The best day to arrive at Tokyo is Thursday and it would be best to avoid Wednesday, as prices are on average 79.6% higher than on Thursday. (Average prices, based on 12280823 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 346 datapoints.)
We have a lot more statistics for flights JL 725 and between Tokyo and Jakarta.