Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 11:50 and arrives at Singapore Changi Airport at 14:35.
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 Jakarta and Singapore
The best month to arrive at Jakarta is November and the most expensive month to fly is September. (Average prices, based on 1846 datapoints.)
We have a lot more statistics for flights PG 4306 and between Jakarta and Singapore.