Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 17:10 and arrives at Surabaya Juanda International Airport at 18:50.
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 September and the most expensive month to fly is June. (Average prices, based on 15345 datapoints.)
We have a lot more statistics for flights PG 4350 and between Jakarta and Surabaya.