The calculated distance (air line) between Phanom Thuan and Nakhon Sawan is approximately 113 miles respectively 181 kilometers.
By car or train, the actual journey to Nakhon Sawan is certainly longer, as only the direct route (as the crow flies) between Phanom Thuan and Nakhon Sawan has been calculated here.
Air line (approximately)
181 kilometers
98 nautical miles