Flight OR Tambo International Airport departs from Johannesburg OR Tambo International Airport at 17:00 and arrives at Nairobi Jomo Kenyatta International Airport at 22:05.
The flighttime is about 4h 05m. The distance travelled ("as the bird flies"): 2508 Km. So the average speed is roughly 614 Km.
There is an 1 hour time difference between Johannesburg and Nairobi