The calculated distance (air line) between Cologne and Neder-Hardinxveld is approximately 110 miles respectively 176 kilometers.
By car or train, the actual journey to Neder-Hardinxveld is certainly longer, as only the direct route (as the crow flies) between Cologne and Neder-Hardinxveld has been calculated here.
Air line (approximately)
176 kilometers
95 nautical miles