The calculated distance (air line) between Nang Rong and Ubon Ratchathani is approximately 143 miles respectively 231 kilometers.
By car or train, the actual journey to Ubon Ratchathani is certainly longer, as only the direct route (as the crow flies) between Nang Rong and Ubon Ratchathani has been calculated here.
Air line (approximately)
231 kilometers
125 nautical miles