The calculated distance (air line) between Samut Songkhram and Nakhon Ratchasima is approximately 177 miles respectively 285 kilometers.
By car or train, the actual journey to Nakhon Ratchasima is certainly longer, as only the direct route (as the crow flies) between Samut Songkhram and Nakhon Ratchasima has been calculated here.
Air line (approximately)
285 kilometers
154 nautical miles