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