Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 17:30 and arrives at Semarang Achmad Yani International Airport at 18:45.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 415 Km. So the average speed is roughly 332 Km.
The best day to arrive at Jakarta is Monday and it would be best to avoid Thursday, as prices are on average 83.51% higher than on Monday. (Average prices, based on 214329175 datapoints.)
We have a lot more statistics for flights MH 4002 and between Jakarta and Semarang.
