Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 18:10 and arrives at Batam Hang Nadim Airport at 19:50.
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 Saturday and it would be best to avoid Wednesday, as prices are on average 11.69% higher than on Saturday. (Average prices, based on 239023613 datapoints.)
We have a lot more statistics for flights IU 350 and between Jakarta and Batam.