Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 02:00 and arrives at Kupang El Tari International Airport at 06:10.
The flighttime is about 3h 10m. The distance travelled ("as the bird flies"): 1900 Km. So the average speed is roughly 600 Km.
There is an 1 hour time difference between Jakarta and Kupang
The best month to arrive at Jakarta is February and the most expensive month to fly is December. (Average prices, based on 12645 datapoints.)
We have a lot more statistics for flights IU 6540 and between Jakarta and Kupang.