Flight Kualanamu International Airport departs from Medan Kualanamu International Airport at 21:00 and arrives at Jakarta Halim Perdanakusuma International Airport at 23:20.
The flighttime is about 2h 20m. The distance travelled ("as the bird flies"): 922 Km. So the average speed is roughly 395 Km.
The best day to arrive at Medan is Thursday and it would be best to avoid Sunday, as prices are on average 5.97% higher than on Thursday. (Average prices, based on 241525557 datapoints.)
We have a lot more statistics for flights IU 889 and between Medan and Jakarta.