The calculated distance (air line) between Jablonec nad Nisou and Havířov is approximately 158 miles respectively 255 kilometers.
By car or train, the actual journey to Havířov is certainly longer, as only the direct route (as the crow flies) between Jablonec nad Nisou and Havířov has been calculated here.
Air line (approximately)
255 kilometers
137 nautical miles