The calculated distance (air line) between Eggenstein-Leopoldshafen and Gelsenkirchen is approximately 176 miles respectively 284 kilometers.
By car or train, the actual journey to Gelsenkirchen is certainly longer, as only the direct route (as the crow flies) between Eggenstein-Leopoldshafen and Gelsenkirchen has been calculated here.
Air line (approximately)
284 kilometers
153 nautical miles