The calculated distance (air line) between Târgu-Mureş and Piatra Neamţ is approximately 88 miles respectively 142 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Târgu-Mureş and Piatra Neamţ has been calculated here.
Air line (approximately)
142 kilometers
76 nautical miles