Flight Guangzhou Baiyun International Airport departs from Guangzhou Guangzhou Baiyun International Airport at 12:50 and arrives at Hefei Hefei Luogang International Airport at 15:15.
The flighttime is about 10h 25m. The distance travelled ("as the bird flies"): 596 Km. So the average speed is roughly 57 Km.
There is an 8 hour time difference between Guangzhou and Hefei