The calculated distance (air line) between Ober-Saulheim and Düsseldorf is approximately 111 miles respectively 179 kilometers.
By car or train, the actual journey to Düsseldorf is certainly longer, as only the direct route (as the crow flies) between Ober-Saulheim and Düsseldorf has been calculated here.
Air line (approximately)
179 kilometers
97 nautical miles