The calculated distance (air line) between Havlíčkův Brod and Třinec is approximately 138 miles respectively 223 kilometers.
By car or train, the actual journey to Třinec is certainly longer, as only the direct route (as the crow flies) between Havlíčkův Brod and Třinec has been calculated here.
Air line (approximately)
223 kilometers
120 nautical miles