The calculated distance (air line) between Senec and Spišská Nová Ves is approximately 153 miles respectively 246 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 Senec and Spišská Nová Ves has been calculated here.
Air line (approximately)
246 kilometers
133 nautical miles