The calculated distance (air line) between Corni and Piatra Neamţ is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Corni and Piatra Neamţ has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles