Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 06:50 and arrives at Surabaya Juanda International Airport at 08:30.
The flighttime is about 1h 40m. The distance travelled ("as the bird flies"): 682 Km. So the average speed is roughly 409 Km.
The best month to arrive at Jakarta is December and the most expensive month to fly is April. (Average prices, based on 7900 datapoints.)
We have a lot more statistics for flights KE 5585 and between Jakarta and Surabaya.
