The calculated distance (air line) between Frenštát pod Radhoštěm and Jihlava is approximately 118 miles respectively 190 kilometers.
By car or train, the actual journey to Jihlava is certainly longer, as only the direct route (as the crow flies) between Frenštát pod Radhoštěm and Jihlava has been calculated here.
Air line (approximately)
190 kilometers
103 nautical miles