The calculated distance (air line) between Bochum and Mittegroßefehn is approximately 133 miles respectively 214 kilometers.
By car or train, the actual journey to Mittegroßefehn is certainly longer, as only the direct route (as the crow flies) between Bochum and Mittegroßefehn has been calculated here.
Air line (approximately)
214 kilometers
115 nautical miles