The calculated distance (air line) between Ban Huai Thalaeng and Udon Thani is approximately 168 miles respectively 271 kilometers.
By car or train, the actual journey to Udon Thani is certainly longer, as only the direct route (as the crow flies) between Ban Huai Thalaeng and Udon Thani has been calculated here.
Air line (approximately)
271 kilometers
146 nautical miles