Flight Achmad Yani International Airport departs from Semarang Achmad Yani International Airport at 12:50 and arrives at Jakarta Soekarno–Hatta International Airport at 14:10.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 415 Km. So the average speed is roughly 311 Km.
The best day to arrive at Semarang is Wednesday and it would be best to avoid Tuesday, as prices are on average 134.98% higher than on Wednesday. (Average prices, based on 134948401 datapoints.)
We have a lot more statistics for flights EY 8119 and between Semarang and Jakarta.