The calculated distance (air line) between Bhisho and Graaff-Reinet is approximately 174 miles respectively 281 kilometers.
By car or train, the actual journey to Graaff-Reinet is certainly longer, as only the direct route (as the crow flies) between Bhisho and Graaff-Reinet has been calculated here.
Air line (approximately)
281 kilometers
152 nautical miles