The calculated distance (air line) between Bucu and Piatra Neamţ is approximately 169 miles respectively 272 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Bucu and Piatra Neamţ has been calculated here.
Air line (approximately)
272 kilometers
147 nautical miles