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 Tuesday and it would be best to avoid Sunday, as prices are on average 20.01% higher than on Tuesday. (Average prices, based on 134616160 datapoints.)
We have a lot more statistics for flights GA 2374 and between Semarang and Jakarta.
