The calculated distance (air line) between Lupeni and Piatra Neamţ is approximately 183 miles respectively 295 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Lupeni and Piatra Neamţ has been calculated here.
Air line (approximately)
295 kilometers
159 nautical miles