The calculated distance (air line) between Poltár and Spišská Nová Ves is approximately 50 miles respectively 80 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 Poltár and Spišská Nová Ves has been calculated here.
Air line (approximately)
80 kilometers
43 nautical miles