The calculated distance (air line) between Dan Khun Thot and Nakhon Pathom is approximately 150 miles respectively 242 kilometers.
By car or train, the actual journey to Nakhon Pathom is certainly longer, as only the direct route (as the crow flies) between Dan Khun Thot and Nakhon Pathom has been calculated here.
Air line (approximately)
242 kilometers
130 nautical miles