The calculated distance (air line) between Kruševac and Sremska Mitrovica is approximately 129 miles respectively 207 kilometers.
By car or train, the actual journey to Sremska Mitrovica is certainly longer, as only the direct route (as the crow flies) between Kruševac and Sremska Mitrovica has been calculated here.
Air line (approximately)
207 kilometers
112 nautical miles