The calculated distance (air line) between Landau in der Pfalz and Düsseldorf is approximately 152 miles respectively 244 kilometers.
By car or train, the actual journey to Düsseldorf is certainly longer, as only the direct route (as the crow flies) between Landau in der Pfalz and Düsseldorf has been calculated here.
Air line (approximately)
244 kilometers
132 nautical miles