Flight Changi Airport departs from Singapore Changi Airport at 19:45 and arrives at Jakarta Soekarno–Hatta International Airport at 20:45.
The flighttime is about 2h 00m. The distance travelled ("as the bird flies"): 369 Km. So the average speed is roughly 184 Km.
There is an 1 hour time difference between Singapore and Jakarta
The best day to arrive at Singapore is Wednesday and it would be best to avoid Friday, as prices are on average 95.51% higher than on Wednesday. (Average prices, based on 407650417 datapoints.)
We have a lot more statistics for flights KL 4043 and between Singapore and Jakarta.
