The calculated distance (air line) between Sing Buri and Nakhon Ratchasima is approximately 113 miles respectively 183 kilometers.
By car or train, the actual journey to Nakhon Ratchasima is certainly longer, as only the direct route (as the crow flies) between Sing Buri and Nakhon Ratchasima has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles