The calculated distance (air line) between Merei and Piatra Neamţ is approximately 124 miles respectively 200 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Merei and Piatra Neamţ has been calculated here.
Air line (approximately)
200 kilometers
108 nautical miles