The calculated distance (air line) between Kranuan and Ubon Ratchathani is approximately 155 miles respectively 250 kilometers.
By car or train, the actual journey to Ubon Ratchathani is certainly longer, as only the direct route (as the crow flies) between Kranuan and Ubon Ratchathani has been calculated here.
Air line (approximately)
250 kilometers
135 nautical miles