Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 11:50 and arrives at Batam Hang Nadim Airport at 13:30.
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 Tuesday and it would be best to avoid Monday, as prices are on average 38.44% higher than on Tuesday. (Average prices, based on 241076999 datapoints.)
We have a lot more statistics for flights IU 2850 and between Jakarta and Batam.
