The calculated distance (air line) between Hoheluft-Ost and Bochum is approximately 186 miles respectively 299 kilometers.
By car or train, the actual journey to Bochum is certainly longer, as only the direct route (as the crow flies) between Hoheluft-Ost and Bochum has been calculated here.
Air line (approximately)
299 kilometers
161 nautical miles