The calculated distance (air line) between Sezimovo Ústí and Havířov is approximately 170 miles respectively 274 kilometers.
By car or train, the actual journey to Havířov is certainly longer, as only the direct route (as the crow flies) between Sezimovo Ústí and Havířov has been calculated here.
Air line (approximately)
274 kilometers
148 nautical miles