Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 16:00 and arrives at Surabaya Juanda International Airport at 17:40.
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 CX 320 and between Jakarta and Surabaya.
AUD