The calculated distance (air line) between Trenčín and Spišská Nová Ves is approximately 114 miles respectively 184 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 Trenčín and Spišská Nová Ves has been calculated here.
Air line (approximately)
184 kilometers
99 nautical miles