The calculated distance (air line) between Knjazevac and Bačka Palanka is approximately 183 miles respectively 294 kilometers.
By car or train, the actual journey to Bačka Palanka is certainly longer, as only the direct route (as the crow flies) between Knjazevac and Bačka Palanka has been calculated here.
Air line (approximately)
294 kilometers
159 nautical miles