Flight Changi Airport departs from Singapore Changi Airport at 03:30 and arrives at Hefei Hefei Luogang International Airport at 08:50.
The flighttime is about 13h 20m. The distance travelled ("as the bird flies"): 1856 Km. So the average speed is roughly 139 Km.
There is an 8 hour time difference between Singapore and Hefei
