The calculated distance (air line) between Ubon Ratchathani and Kuchinarai is approximately 104 miles respectively 168 kilometers.
By car or train, the actual journey to Kuchinarai is certainly longer, as only the direct route (as the crow flies) between Ubon Ratchathani and Kuchinarai has been calculated here.
Air line (approximately)
168 kilometers
91 nautical miles