Flight Juanda International Airport departs from Surabaya Juanda International Airport at 19:25 and arrives at Jakarta Soekarno–Hatta International Airport at 21:05.
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 day to arrive at Surabaya is Thursday and it would be best to avoid Monday, as prices are on average 200.95% higher than on Thursday. (Average prices, based on 548633130 datapoints.)
We have a lot more statistics for flights GA 3154 and between Surabaya and Jakarta.