The calculated distance (air line) between Bochum-Hordel and De Meern is approximately 100 miles respectively 161 kilometers.
By car or train, the actual journey to De Meern is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and De Meern has been calculated here.
Air line (approximately)
161 kilometers
87 nautical miles