Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 14:10 and arrives at Surabaya Juanda International Airport at 15:40.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 682 Km. So the average speed is roughly 455 Km.
The best month to arrive at Jakarta is October and the most expensive month to fly is December. (Average prices, based on 4127 datapoints.)
We have a lot more statistics for flights AK 689 and between Jakarta and Surabaya.