Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 13:25 and arrives at Semarang Achmad Yani International Airport at 14:40.
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 month to arrive at Jakarta is December and the most expensive month to fly is April. (Average prices, based on 816 datapoints.)
The best day to arrive at Jakarta is Friday and it would be best to avoid Wednesday, as prices are on average 20% higher than on Friday. (Average prices, based on 126863513 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 799 datapoints.)
We have a lot more statistics for flights GA 242 and between Jakarta and Semarang.