The calculated distance (air line) between Queenstown and Graaff-Reinet is approximately 139 miles respectively 224 kilometers.
By car or train, the actual journey to Graaff-Reinet is certainly longer, as only the direct route (as the crow flies) between Queenstown and Graaff-Reinet has been calculated here.
Air line (approximately)
224 kilometers
121 nautical miles