The calculated distance (air line) between Mpumalanga and Phuthaditjhaba is approximately 141 miles respectively 228 kilometers.
By car or train, the actual journey to Phuthaditjhaba is certainly longer, as only the direct route (as the crow flies) between Mpumalanga and Phuthaditjhaba has been calculated here.
Air line (approximately)
228 kilometers
123 nautical miles