The calculated distance (air line) between Ubon Ratchathani and Maha Sarakham is approximately 122 miles respectively 196 kilometers.
By car or train, the actual journey to Maha Sarakham is certainly longer, as only the direct route (as the crow flies) between Ubon Ratchathani and Maha Sarakham has been calculated here.
Air line (approximately)
196 kilometers
106 nautical miles