Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 13:40 and arrives at Singapore Changi Airport at 16:35.
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 Jakarta and Singapore
The best month to arrive at Jakarta is February and the most expensive month to fly is September. (Average prices, based on 1820 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Sunday, as prices are on average 144.6% higher than on Tuesday. (Average prices, based on 548738552 datapoints.)
We have a lot more statistics for flights QF 834 and between Jakarta and Singapore.