The calculated distance (air line) between Vanderbijlpark and Potchefstroom is approximately 46 miles respectively 73 kilometers.
By car or train, the actual journey to Potchefstroom is certainly longer, as only the direct route (as the crow flies) between Vanderbijlpark and Potchefstroom has been calculated here.
Air line (approximately)
73 kilometers
40 nautical miles