Flight Beijing Capital International Airport departs from Beijing Beijing Capital International Airport at 15:30 and arrives at Riyadh King Khaled International Airport at 20:55.
The flighttime is about 10h 25m. The distance travelled ("as the bird flies"): 7700 Km. So the average speed is roughly 739 Km.
There is an 5 hour time difference between Beijing and Riyadh
