Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 18:20 and arrives at Medan Kualanamu International Airport at 20:40.
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 Saturday and it would be best to avoid Sunday, as prices are on average 4.43% higher than on Saturday. (Average prices, based on 742808340 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 397 datapoints.)
We have a lot more statistics for flights QG 912 and between Jakarta and Medan.