The calculated distance (air line) between Luncaviţa and Piatra Neamţ is approximately 146 miles respectively 235 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Luncaviţa and Piatra Neamţ has been calculated here.
Air line (approximately)
235 kilometers
127 nautical miles