The calculated distance (air line) between Mireşu Mare and Piatra Neamţ is approximately 146 miles respectively 236 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Mireşu Mare and Piatra Neamţ has been calculated here.
Air line (approximately)
236 kilometers
127 nautical miles