The calculated distance (air line) between Na Mom and Nakhon Si Thammarat is approximately 110 miles respectively 176 kilometers.
By car or train, the actual journey to Nakhon Si Thammarat is certainly longer, as only the direct route (as the crow flies) between Na Mom and Nakhon Si Thammarat has been calculated here.
Air line (approximately)
176 kilometers
95 nautical miles