The calculated distance (air line) between Ginsheim-Gustavsburg and Riedstadt is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Riedstadt is certainly longer, as only the direct route (as the crow flies) between Ginsheim-Gustavsburg and Riedstadt has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles