The calculated distance (air line) between Plettenberg Bay and Graaff-Reinet is approximately 141 miles respectively 227 kilometers.
By car or train, the actual journey to Graaff-Reinet is certainly longer, as only the direct route (as the crow flies) between Plettenberg Bay and Graaff-Reinet has been calculated here.
Air line (approximately)
227 kilometers
123 nautical miles