The calculated distance (air line) between Oer-Erkenschwick and Schermbeck is approximately 17 miles respectively 28 kilometers.
By car or train, the actual journey to Schermbeck is certainly longer, as only the direct route (as the crow flies) between Oer-Erkenschwick and Schermbeck has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles