The calculated distance (air line) between Savannakhet and Ubon Ratchathani is approximately 92 miles respectively 148 kilometers.
By car or train, the actual journey to Ubon Ratchathani is certainly longer, as only the direct route (as the crow flies) between Savannakhet and Ubon Ratchathani has been calculated here.
Air line (approximately)
148 kilometers
80 nautical miles