Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 20:00 and arrives at Medan Kualanamu International Airport at 22:20.
The flighttime is about 2h 20m. The distance travelled ("as the bird flies"): 895 Km. So the average speed is roughly 384 Km.
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Wednesday, as prices are on average 19.95% higher than on Tuesday. (Average prices, based on 752831675 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 160 datapoints.)
We have a lot more statistics for flights JT 3882 and between Jakarta and Medan.