Flight OR Tambo International Airport departs from Johannesburg OR Tambo International Airport at 20:00 and arrives at New York John F Kennedy International Airport at 05:50.
The flighttime is about 15h 50m. The distance travelled ("as the bird flies"): 12335 Km. So the average speed is roughly 779 Km.
There is an 6 hour time difference between Johannesburg and New York