Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 06:00 and arrives at Batam Hang Nadim Airport at 07:45.
The flighttime is about 1h 45m. The distance travelled ("as the bird flies"): 354 Km. So the average speed is roughly 202 Km.
The best month to arrive at Jakarta is February and the most expensive month to fly is October. (Average prices, based on 3382 datapoints.)
We have a lot more statistics for flights KL 150 and between Jakarta and Batam.