Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 14:10 and arrives at Singapore Changi Airport at 17:00.
The flighttime is about 1h 50m. The distance travelled ("as the bird flies"): 369 Km. So the average speed is roughly 201 Km.
There is an 1 hour time difference between Jakarta and Singapore
The best day to arrive at Jakarta is Saturday and it would be best to avoid Wednesday, as prices are on average 324.02% higher than on Saturday. (Average prices, based on 592593174 datapoints.)
We have a lot more statistics for flights NH 959 and between Jakarta and Singapore.