Flight Changi Airport departs from Singapore Changi Airport at 16:35 and arrives at Jakarta Soekarno–Hatta International Airport at 17:20.
The flighttime is about 1h 45m. The distance travelled ("as the bird flies"): 369 Km. So the average speed is roughly 211 Km.
There is an 1 hour time difference between Singapore and Jakarta
The best day to arrive at Singapore is Saturday and it would be best to avoid Friday, as prices are on average 46.65% higher than on Saturday. (Average prices, based on 283243801 datapoints.)
We have a lot more statistics for flights OD 7156 and between Singapore and Jakarta.