Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 10:05 and arrives at Jambi Sultan Thaha Airport at 11:25.
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 month to arrive at Jakarta is May and the most expensive month to fly is December. (Average prices, based on 852 datapoints.)
We have a lot more statistics for flights OD 842 and between Jakarta and Jambi.
