Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 13:25 and arrives at Surabaya Juanda International Airport at 15:05.
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 February and the most expensive month to fly is September. (Average prices, based on 2448 datapoints.)
We have a lot more statistics for flights QR 316 and between Jakarta and Surabaya.