The calculated distance (air line) between Stuttgart and Ludwigshafen am Rhein is approximately 59 miles respectively 94 kilometers.
By car or train, the actual journey to Ludwigshafen am Rhein is certainly longer, as only the direct route (as the crow flies) between Stuttgart and Ludwigshafen am Rhein has been calculated here.
Air line (approximately)
94 kilometers
51 nautical miles