The calculated distance (air line) between Greytown and Phuthaditjhaba is approximately 114 miles respectively 183 kilometers.
By car or train, the actual journey to Phuthaditjhaba is certainly longer, as only the direct route (as the crow flies) between Greytown and Phuthaditjhaba has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles