Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 08:00 and arrives at Medan Kualanamu International Airport at 11:20.
The flighttime is about 3h 20m. The distance travelled ("as the bird flies"): 895 Km. So the average speed is roughly 268 Km.
The best day to arrive at Jakarta is Monday and it would be best to avoid Sunday, as prices are on average 26.88% higher than on Monday. (Average prices, based on 750102912 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 274 datapoints.)
We have a lot more statistics for flights JT 298 and between Jakarta and Medan.