The calculated distance (air line) between Câmpeni and Piatra Neamţ is approximately 160 miles respectively 258 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Câmpeni and Piatra Neamţ has been calculated here.
Air line (approximately)
258 kilometers
139 nautical miles