Flight OR Tambo International Airport departs from Johannesburg OR Tambo International Airport at 11:05 and arrives at Hong Kong Hong Kong International Airport at 05:50.
The flighttime is about 12h 45m. The distance travelled ("as the bird flies"): 8752 Km. So the average speed is roughly 686 Km.
There is an 6 hour time difference between Johannesburg and Hong Kong