Flight Juanda International Airport departs from Surabaya Juanda International Airport at 14:00 and arrives at Jakarta Soekarno–Hatta International Airport at 15:25.
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 Saturday and it would be best to avoid Monday, as prices are on average 12.73% higher than on Saturday. (Average prices, based on 544608139 datapoints.)
We have a lot more statistics for flights QG 171 and between Surabaya and Jakarta.