The calculated distance (air line) between Stilfontein and Schweizer-Reneke is approximately 92 miles respectively 148 kilometers.
By car or train, the actual journey to Schweizer-Reneke is certainly longer, as only the direct route (as the crow flies) between Stilfontein and Schweizer-Reneke has been calculated here.
Air line (approximately)
148 kilometers
80 nautical miles