The calculated distance (air line) between Frenštát pod Radhoštěm and Mladá Boleslav is approximately 159 miles respectively 255 kilometers.
By car or train, the actual journey to Mladá Boleslav is certainly longer, as only the direct route (as the crow flies) between Frenštát pod Radhoštěm and Mladá Boleslav has been calculated here.
Air line (approximately)
255 kilometers
138 nautical miles