The calculated distance (air line) between Piešťany and Spišská Nová Ves is approximately 127 miles respectively 204 kilometers.
By car or train, the actual journey to Spišská Nová Ves is certainly longer, as only the direct route (as the crow flies) between Piešťany and Spišská Nová Ves has been calculated here.
Air line (approximately)
204 kilometers
110 nautical miles