The calculated distance (air line) between Nakhon Ratchasima and Klaeng is approximately 154 miles respectively 248 kilometers.
By car or train, the actual journey to Klaeng is certainly longer, as only the direct route (as the crow flies) between Nakhon Ratchasima and Klaeng has been calculated here.
Air line (approximately)
248 kilometers
134 nautical miles