The calculated distance (air line) between Nakhon Phanom and Sawang Daen Din is approximately 87 miles respectively 140 kilometers.
By car or train, the actual journey to Sawang Daen Din is certainly longer, as only the direct route (as the crow flies) between Nakhon Phanom and Sawang Daen Din has been calculated here.
Air line (approximately)
140 kilometers
76 nautical miles