The calculated distance (air line) between Nakhon Phanom and Bueng Kan is approximately 99 miles respectively 159 kilometers.
By car or train, the actual journey to Bueng Kan is certainly longer, as only the direct route (as the crow flies) between Nakhon Phanom and Bueng Kan has been calculated here.
Air line (approximately)
159 kilometers
86 nautical miles