Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 16:00 and arrives at Jambi Sultan Thaha Airport at 17:20.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 360 Km. So the average speed is roughly 270 Km.
The best day to arrive at Jakarta is Sunday and it would be best to avoid Friday, as prices are on average 13.57% higher than on Sunday. (Average prices, based on 40998011 datapoints.)
We have a lot more statistics for flights IU 826 and between Jakarta and Jambi.