Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 11:45 and arrives at Bengkulu Fatmawati Soekarno Airport at 13:00.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 483 Km. So the average speed is roughly 386 Km.
The best day to arrive at Jakarta is Saturday and it would be best to avoid Tuesday, as prices are on average 102.97% higher than on Saturday. (Average prices, based on 19932589 datapoints.)
We have a lot more statistics for flights IU 830 and between Jakarta and Bengkulu.