What is the mode of transportation and the time required between Johannesburg and Durban?

Your time requirements are relatively high. The only way to get there is by plane. It is more than 800 kilometers from Johannesburg to Durban. The flight time is 1 hour 10 minute. There are many flights, basically every hour, and the one-way fare is around 700 rand. The time from Durban to Joburg is relatively relaxed, so you can choose train or plane.