Flight Kualanamu International Airport departs from Medan Kualanamu International Airport at 08:45 and arrives at Seletar Seletar Airport at 11:05.
The flighttime is about 9h 20m. The distance travelled ("as the bird flies"): 558 Km. So the average speed is roughly 60 Km.
There is an 7 hour time difference between Medan and Seletar