Flight Juanda International Airport departs from Surabaya Juanda International Airport at 19:55 and arrives at Jakarta Soekarno–Hatta International Airport at 21:35.
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 Saturday and it would be best to avoid Monday, as prices are on average 41.33% higher than on Saturday. (Average prices, based on 542975886 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 607 datapoints.)
We have a lot more statistics for flights GA 319 and between Surabaya and Jakarta.