The calculated distance (air line) between Offenbach an der Queich and Bochum is approximately 164 miles respectively 264 kilometers.
By car or train, the actual journey to Bochum is certainly longer, as only the direct route (as the crow flies) between Offenbach an der Queich and Bochum has been calculated here.
Air line (approximately)
264 kilometers
142 nautical miles