The calculated distance (air line) between Nakhon Thai and Nakhon Ratchasima is approximately 169 miles respectively 273 kilometers.
By car or train, the actual journey to Nakhon Ratchasima is certainly longer, as only the direct route (as the crow flies) between Nakhon Thai and Nakhon Ratchasima has been calculated here.
Air line (approximately)
273 kilometers
147 nautical miles