Flight Achmad Yani International Airport departs from Semarang Achmad Yani International Airport at 15:30 and arrives at Jakarta Soekarno–Hatta International Airport at 16:50.
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 Thursday and it would be best to avoid Wednesday, as prices are on average 99.25% higher than on Thursday. (Average prices, based on 134892049 datapoints.)
We have a lot more statistics for flights MH 5873 and between Semarang and Jakarta.