Flight Narita International Airport departs from Tokyo Narita International Airport at 18:00 and arrives at Jakarta Soekarno–Hatta International Airport at 23:50.
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 August and the most expensive month to fly is December. (Average prices, based on 225 datapoints.)
The best day to arrive at Tokyo is Sunday and it would be best to avoid Saturday, as prices are on average 31.31% higher than on Sunday. (Average prices, based on 8012068 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 210 datapoints.)
We have a lot more statistics for flights JL 729 and between Tokyo and Jakarta.