The calculated distance (air line) between Bochum-Hordel and Katwijk aan Zee is approximately 128 miles respectively 206 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 Bochum-Hordel and Katwijk aan Zee has been calculated here.
Air line (approximately)
206 kilometers
111 nautical miles