The calculated distance (air line) between Surin and Nakhon Ratchasima is approximately 93 miles respectively 150 kilometers.
By car or train, the actual journey to Nakhon Ratchasima is certainly longer, as only the direct route (as the crow flies) between Surin and Nakhon Ratchasima has been calculated here.
Air line (approximately)
150 kilometers
81 nautical miles