The calculated distance (air line) between Brandýs nad Labem-Stará Boleslav and Liberec is approximately 44 miles respectively 70 kilometers.
By car or train, the actual journey to Liberec is certainly longer, as only the direct route (as the crow flies) between Brandýs nad Labem-Stará Boleslav and Liberec has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles