Flight Guangzhou Baiyun International Airport departs from Guangzhou Guangzhou Baiyun International Airport at 14:20 and arrives at London London Gatwick Airport at 19:40.
The flighttime is about 12h 20m. The distance travelled ("as the bird flies"): 12306 Km. So the average speed is roughly 998 Km.
There is an 7 hour time difference between Guangzhou and London
