Flight Kualanamu International Airport departs from Medan Kualanamu International Airport at 15:15 and arrives at Bangkok Don Mueang International Airport at 17:20.
The flighttime is about 2h 05m. The distance travelled ("as the bird flies"): 272 Km. So the average speed is roughly 131 Km.
The best day to arrive at Medan is Monday and it would be best to avoid Tuesday, as prices are on average 105.32% higher than on Monday. (Average prices, based on 603201 datapoints.)
We have a lot more statistics for flights QZ 156 and between Medan and Bangkok.