The calculated distance (air line) between Sector 3 and Piatra Neamţ is approximately 172 miles respectively 278 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Sector 3 and Piatra Neamţ has been calculated here.
Air line (approximately)
278 kilometers
150 nautical miles