Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 15:00 and arrives at Batam Hang Nadim Airport at 16:40.
The flighttime is about 1h 40m. The distance travelled ("as the bird flies"): 354 Km. So the average speed is roughly 212 Km.
The best day to arrive at Jakarta is Monday and it would be best to avoid Wednesday, as prices are on average 22.67% higher than on Monday. (Average prices, based on 241696355 datapoints.)
We have a lot more statistics for flights GA 1542 and between Jakarta and Batam.