The calculated distance (air line) between Sangkhla Buri and Nakhon Pathom is approximately 141 miles respectively 227 kilometers.
By car or train, the actual journey to Nakhon Pathom is certainly longer, as only the direct route (as the crow flies) between Sangkhla Buri and Nakhon Pathom has been calculated here.
Air line (approximately)
227 kilometers
122 nautical miles