The calculated distance (air line) between Schönenberg-Kübelberg and Duisburg is approximately 142 miles respectively 229 kilometers.
By car or train, the actual journey to Duisburg is certainly longer, as only the direct route (as the crow flies) between Schönenberg-Kübelberg and Duisburg has been calculated here.
Air line (approximately)
229 kilometers
124 nautical miles