The calculated distance (air line) between Mohelnice and Frýdek-Místek is approximately 64 miles respectively 103 kilometers.
By car or train, the actual journey to Frýdek-Místek is certainly longer, as only the direct route (as the crow flies) between Mohelnice and Frýdek-Místek has been calculated here.
Air line (approximately)
103 kilometers
56 nautical miles