The calculated distance (air line) between Banatski Karlovac and Bačka Palanka is approximately 80 miles respectively 129 kilometers.
By car or train, the actual journey to Bačka Palanka is certainly longer, as only the direct route (as the crow flies) between Banatski Karlovac and Bačka Palanka has been calculated here.
Air line (approximately)
129 kilometers
70 nautical miles