The calculated distance (air line) between Erbiceni and Piatra Neamţ is approximately 49 miles respectively 78 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Erbiceni and Piatra Neamţ has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles