The calculated distance (air line) between Nové Mesto nad Váhom and Piešťany is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Piešťany is certainly longer, as only the direct route (as the crow flies) between Nové Mesto nad Váhom and Piešťany has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles