The calculated distance (air line) between Nörten-Hardenberg and Gelsenkirchen is approximately 122 miles respectively 197 kilometers.
By car or train, the actual journey to Gelsenkirchen is certainly longer, as only the direct route (as the crow flies) between Nörten-Hardenberg and Gelsenkirchen has been calculated here.
Air line (approximately)
197 kilometers
106 nautical miles