The calculated distance (air line) between Srpska Crnja and Sremska Mitrovica is approximately 74 miles respectively 118 kilometers.
By car or train, the actual journey to Sremska Mitrovica is certainly longer, as only the direct route (as the crow flies) between Srpska Crnja and Sremska Mitrovica has been calculated here.
Air line (approximately)
118 kilometers
64 nautical miles