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