The calculated distance (air line) between Vinh and Nakhon Phanom is approximately 106 miles respectively 170 kilometers.
By car or train, the actual journey to Nakhon Phanom is certainly longer, as only the direct route (as the crow flies) between Vinh and Nakhon Phanom has been calculated here.
Air line (approximately)
170 kilometers
92 nautical miles