The calculated distance (air line) between Ladenburg and Bochum-Hordel is approximately 154 miles respectively 247 kilometers.
By car or train, the actual journey to Bochum-Hordel is certainly longer, as only the direct route (as the crow flies) between Ladenburg and Bochum-Hordel has been calculated here.
Air line (approximately)
247 kilometers
133 nautical miles