The calculated distance (air line) between Hrádek nad Nisou and Mladá Boleslav is approximately 31 miles respectively 49 kilometers.
By car or train, the actual journey to Mladá Boleslav is certainly longer, as only the direct route (as the crow flies) between Hrádek nad Nisou and Mladá Boleslav has been calculated here.
Air line (approximately)
49 kilometers
27 nautical miles