The calculated distance (air line) between Mörfelden-Walldorf and Bochum is approximately 119 miles respectively 191 kilometers.
By car or train, the actual journey to Bochum is certainly longer, as only the direct route (as the crow flies) between Mörfelden-Walldorf and Bochum has been calculated here.
Air line (approximately)
191 kilometers
103 nautical miles