The calculated distance (air line) between Kragujevac and Sremska Mitrovica is approximately 92 miles respectively 149 kilometers.
By car or train, the actual journey to Sremska Mitrovica is certainly longer, as only the direct route (as the crow flies) between Kragujevac and Sremska Mitrovica has been calculated here.
Air line (approximately)
149 kilometers
80 nautical miles