Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 15:25 and arrives at Surabaya Juanda International Airport at 17:00.
The flighttime is about 1h 35m. The distance travelled ("as the bird flies"): 682 Km. So the average speed is roughly 431 Km.
The best month to arrive at Jakarta is October and the most expensive month to fly is June. (Average prices, based on 29079 datapoints.)
We have a lot more statistics for flights CI 318 and between Jakarta and Surabaya.