The calculated distance (air line) between Buchholz in der Nordheide and Gelsenkirchen is approximately 172 miles respectively 276 kilometers.
By car or train, the actual journey to Gelsenkirchen is certainly longer, as only the direct route (as the crow flies) between Buchholz in der Nordheide and Gelsenkirchen has been calculated here.
Air line (approximately)
276 kilometers
149 nautical miles