The calculated distance (air line) between Modra and Spišská Nová Ves is approximately 154 miles respectively 249 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 Modra and Spišská Nová Ves has been calculated here.
Air line (approximately)
249 kilometers
134 nautical miles