The calculated distance (air line) between Nakhon Si Thammarat and Songkhla is approximately 96 miles respectively 154 kilometers.
By car or train, the actual journey to Songkhla is certainly longer, as only the direct route (as the crow flies) between Nakhon Si Thammarat and Songkhla has been calculated here.
Air line (approximately)
154 kilometers
83 nautical miles