The calculated distance (air line) between Nakhon Ratchasima and Nakhon Pathom is approximately 159 miles respectively 256 kilometers.
By car or train, the actual journey to Nakhon Pathom is certainly longer, as only the direct route (as the crow flies) between Nakhon Ratchasima and Nakhon Pathom has been calculated here.
Air line (approximately)
256 kilometers
138 nautical miles