Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 19:00 and arrives at Singapore Changi Airport at 21:50.
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 day to arrive at Jakarta is Saturday and it would be best to avoid Monday, as prices are on average 456.79% higher than on Saturday. (Average prices, based on 581150997 datapoints.)
We have a lot more statistics for flights LH 9795 and between Jakarta and Singapore.