The calculated distance (air line) between Brandýs nad Labem-Stará Boleslav and Třinec is approximately 182 miles respectively 292 kilometers.
By car or train, the actual journey to Třinec is certainly longer, as only the direct route (as the crow flies) between Brandýs nad Labem-Stará Boleslav and Třinec has been calculated here.
Air line (approximately)
292 kilometers
158 nautical miles