Flight Juanda International Airport departs from Surabaya Juanda International Airport at 05:10 and arrives at Jakarta Soekarno–Hatta International Airport at 06:35.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 682 Km. So the average speed is roughly 481 Km.
The best day to arrive at Surabaya is Friday and it would be best to avoid Tuesday, as prices are on average 18.84% higher than on Friday. (Average prices, based on 569117695 datapoints.)
We have a lot more statistics for flights QG 181 and between Surabaya and Jakarta.