Flight OR Tambo International Airport departs from Johannesburg OR Tambo International Airport at 19:50 and arrives at Doha International Airport at 05:15.
The flighttime is about 8h 25m. The distance travelled ("as the bird flies"): 4956 Km. So the average speed is roughly 589 Km.
There is an 1 hour time difference between Johannesburg and Doha