The calculated distance (air line) between Třešť and Frýdek-Místek is approximately 132 miles respectively 212 kilometers.
By car or train, the actual journey to Frýdek-Místek is certainly longer, as only the direct route (as the crow flies) between Třešť and Frýdek-Místek has been calculated here.
Air line (approximately)
212 kilometers
114 nautical miles