The calculated distance (air line) between Banatski Karlovac and Sremska Mitrovica is approximately 69 miles respectively 111 kilometers.
By car or train, the actual journey to Sremska Mitrovica is certainly longer, as only the direct route (as the crow flies) between Banatski Karlovac and Sremska Mitrovica has been calculated here.
Air line (approximately)
111 kilometers
60 nautical miles