Flight OR Tambo International Airport departs from Johannesburg OR Tambo International Airport at 15:00 and arrives at Windhoek Hosea Kutako International Airport at 16:55.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 1255 Km. So the average speed is roughly 320 Km.
There is an 2 hour time difference between Johannesburg and Windhoek