The calculated distance (air line) between Yên Vinh and Nakhon Phanom is approximately 105 miles respectively 168 kilometers.
By car or train, the actual journey to Nakhon Phanom is certainly longer, as only the direct route (as the crow flies) between Yên Vinh and Nakhon Phanom has been calculated here.
Air line (approximately)
168 kilometers
91 nautical miles