Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 08:30 and arrives at Medan Kualanamu International Airport at 10:50.
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 Wednesday and it would be best to avoid Tuesday, as prices are on average 18.44% higher than on Wednesday. (Average prices, based on 752687856 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 201 datapoints.)
We have a lot more statistics for flights JT 6128 and between Jakarta and Medan.