The calculated distance (air line) between Simeria and Piatra Neamţ is approximately 174 miles respectively 281 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Simeria and Piatra Neamţ has been calculated here.
Air line (approximately)
281 kilometers
151 nautical miles