The calculated distance (air line) between Sawang Daen Din and Udon Thani is approximately 44 miles respectively 72 kilometers.
By car or train, the actual journey to Udon Thani is certainly longer, as only the direct route (as the crow flies) between Sawang Daen Din and Udon Thani has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles