The calculated distance (air line) between Ubon Ratchathani and Prakhon Chai is approximately 123 miles respectively 199 kilometers.
By car or train, the actual journey to Prakhon Chai is certainly longer, as only the direct route (as the crow flies) between Ubon Ratchathani and Prakhon Chai has been calculated here.
Air line (approximately)
199 kilometers
107 nautical miles