The calculated distance (air line) between Pietrasanta and Reggio nell'Emilia is approximately 55 miles respectively 88 kilometers.
By car or train, the actual journey to Reggio nell'Emilia is certainly longer, as only the direct route (as the crow flies) between Pietrasanta and Reggio nell'Emilia has been calculated here.
Air line (approximately)
88 kilometers
48 nautical miles