The calculated distance (air line) between Geoagiu and Piatra Neamţ is approximately 164 miles respectively 265 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Geoagiu and Piatra Neamţ has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles