Flight Changi Airport departs from Singapore Changi Airport at 19:00 and arrives at Medan Kualanamu International Airport at 19:20.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 571 Km. So the average speed is roughly 428 Km.
There is an 1 hour time difference between Singapore and Medan
The best day to arrive at Singapore is Saturday and it would be best to avoid Sunday, as prices are on average 212.67% higher than on Saturday. (Average prices, based on 2560650 datapoints.)
We have a lot more statistics for flights GA 9910 and between Singapore and Medan.