The calculated distance (air line) between Nong Kung Si and Ubon Ratchathani is approximately 142 miles respectively 228 kilometers.
By car or train, the actual journey to Ubon Ratchathani is certainly longer, as only the direct route (as the crow flies) between Nong Kung Si and Ubon Ratchathani has been calculated here.
Air line (approximately)
228 kilometers
123 nautical miles