The calculated distance (air line) between Nové Mesto nad Váhom and Bratislava is approximately 54 miles respectively 86 kilometers.
By car or train, the actual journey to Bratislava is certainly longer, as only the direct route (as the crow flies) between Nové Mesto nad Váhom and Bratislava has been calculated here.
Air line (approximately)
86 kilometers
47 nautical miles