The calculated distance (air line) between Apatin and Smederevska Palanka is approximately 132 miles respectively 213 kilometers.
By car or train, the actual journey to Smederevska Palanka is certainly longer, as only the direct route (as the crow flies) between Apatin and Smederevska Palanka has been calculated here.
Air line (approximately)
213 kilometers
115 nautical miles