The calculated distance (air line) between Liptovský Hrádok and Lučenec is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Lučenec is certainly longer, as only the direct route (as the crow flies) between Liptovský Hrádok and Lučenec has been calculated here.
Air line (approximately)
79 kilometers
42 nautical miles