The calculated distance (air line) between Nakhon Phanom and Nong Wua So is approximately 147 miles respectively 236 kilometers.
By car or train, the actual journey to Nong Wua So is certainly longer, as only the direct route (as the crow flies) between Nakhon Phanom and Nong Wua So has been calculated here.
Air line (approximately)
236 kilometers
127 nautical miles