The calculated distance (air line) between Durban and Phuthaditjhaba is approximately 162 miles respectively 261 kilometers.
By car or train, the actual journey to Phuthaditjhaba is certainly longer, as only the direct route (as the crow flies) between Durban and Phuthaditjhaba has been calculated here.
Air line (approximately)
261 kilometers
141 nautical miles