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