The calculated distance (air line) between Spišská Nová Ves and Humenné is approximately 61 miles respectively 99 kilometers.
By car or train, the actual journey to Humenné is certainly longer, as only the direct route (as the crow flies) between Spišská Nová Ves and Humenné has been calculated here.
Air line (approximately)
99 kilometers
53 nautical miles