Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 17:00 and arrives at Singapore Changi Airport at 19:50.
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 month to arrive at Jakarta is February and the most expensive month to fly is June. (Average prices, based on 11969 datapoints.)
We have a lot more statistics for flights QF 961 and between Jakarta and Singapore.