The calculated distance (air line) between Pantelimon and Piatra Neamţ is approximately 171 miles respectively 274 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Pantelimon and Piatra Neamţ has been calculated here.
Air line (approximately)
274 kilometers
148 nautical miles