Flight Achmad Yani International Airport departs from Semarang Achmad Yani International Airport at 14:25 and arrives at Jakarta Soekarno–Hatta International Airport at 15:25.
The flighttime is about 1h 00m. The distance travelled ("as the bird flies"): 415 Km. So the average speed is roughly 415 Km.
The best day to arrive at Semarang is Monday and it would be best to avoid Thursday, as prices are on average 148.65% higher than on Monday. (Average prices, based on 103083539 datapoints.)
We have a lot more statistics for flights QG 147 and between Semarang and Jakarta.