The calculated distance (air line) between Iernut and Piatra Neamţ is approximately 104 miles respectively 167 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Iernut and Piatra Neamţ has been calculated here.
Air line (approximately)
167 kilometers
90 nautical miles