The calculated distance (air line) between Cornetu and Piatra Neamţ is approximately 179 miles respectively 288 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Cornetu and Piatra Neamţ has been calculated here.
Air line (approximately)
288 kilometers
155 nautical miles