The calculated distance (air line) between Ruma and Sremska Mitrovica is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Sremska Mitrovica is certainly longer, as only the direct route (as the crow flies) between Ruma and Sremska Mitrovica has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles