Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 18:05 and arrives at Singapore Changi Airport at 20:55.
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 10.76% higher than on Saturday. (Average prices, based on 580755278 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 617 datapoints.)
We have a lot more statistics for flights GA 8963 and between Jakarta and Singapore.