The calculated distance (air line) between Petrovaradin and Sremska Mitrovica is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Sremska Mitrovica is certainly longer, as only the direct route (as the crow flies) between Petrovaradin and Sremska Mitrovica has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles