Flight Achmad Yani International Airport departs from Semarang Achmad Yani International Airport at 12:15 and arrives at Jakarta Soekarno–Hatta International Airport at 13:25.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 415 Km. So the average speed is roughly 356 Km.
The best day to arrive at Semarang is Friday and it would be best to avoid Monday, as prices are on average 18.23% higher than on Friday. (Average prices, based on 103136548 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 946 datapoints.)
We have a lot more statistics for flights SL 6339 and between Semarang and Jakarta.