The calculated distance (air line) between Brezoi and Piatra Neamţ is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Brezoi and Piatra Neamţ has been calculated here.
Air line (approximately)
238 kilometers
128 nautical miles