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