The calculated distance (air line) between Bochum-Hordel and Braunschweig is approximately 152 miles respectively 245 kilometers.
By car or train, the actual journey to Braunschweig is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Braunschweig has been calculated here.
Air line (approximately)
245 kilometers
132 nautical miles