The calculated distance (air line) between Karlsdorf-Neuthard and Gelsenkirchen is approximately 176 miles respectively 283 kilometers.
By car or train, the actual journey to Gelsenkirchen is certainly longer, as only the direct route (as the crow flies) between Karlsdorf-Neuthard and Gelsenkirchen has been calculated here.
Air line (approximately)
283 kilometers
152 nautical miles