Flight Changi Airport departs from Singapore Changi Airport at 15:35 and arrives at Jakarta Soekarno–Hatta International Airport at 16:15.
The flighttime is about 1h 40m. The distance travelled ("as the bird flies"): 369 Km. So the average speed is roughly 221 Km.
There is an 1 hour time difference between Singapore and Jakarta
The best day to arrive at Singapore is Tuesday and it would be best to avoid Sunday, as prices are on average 187.04% higher than on Tuesday. (Average prices, based on 282734551 datapoints.)
We have a lot more statistics for flights 8B 9156 and between Singapore and Jakarta.