The calculated distance (air line) between Bochum-Hordel and Oegstgeest is approximately 125 miles respectively 201 kilometers.
By car or train, the actual journey to Oegstgeest is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Oegstgeest has been calculated here.
Air line (approximately)
201 kilometers
108 nautical miles