The calculated distance (air line) between Schieder-Schwalenberg and Duisburg is approximately 109 miles respectively 175 kilometers.
By car or train, the actual journey to Duisburg is certainly longer, as only the direct route (as the crow flies) between Schieder-Schwalenberg and Duisburg has been calculated here.
Air line (approximately)
175 kilometers
94 nautical miles