The calculated distance (air line) between Novi Pazar and Sremska Mitrovica is approximately 135 miles respectively 217 kilometers.
By car or train, the actual journey to Sremska Mitrovica is certainly longer, as only the direct route (as the crow flies) between Novi Pazar and Sremska Mitrovica has been calculated here.
Air line (approximately)
217 kilometers
117 nautical miles