Flight Changi Airport departs from Singapore Changi Airport at 11:25 and arrives at Jakarta Soekarno–Hatta International Airport at 12:20.
The flighttime is about 1h 55m. The distance travelled ("as the bird flies"): 369 Km. So the average speed is roughly 193 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 72.95% higher than on Tuesday. (Average prices, based on 281519739 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 132 datapoints.)
We have a lot more statistics for flights SL 7154 and between Singapore and Jakarta.