The calculated distance (air line) between Kaset Wisai and Udon Thani is approximately 133 miles respectively 213 kilometers.
By car or train, the actual journey to Udon Thani is certainly longer, as only the direct route (as the crow flies) between Kaset Wisai and Udon Thani has been calculated here.
Air line (approximately)
213 kilometers
115 nautical miles