The calculated distance (air line) between Slavkov u Brna and Mladá Boleslav is approximately 124 miles respectively 199 kilometers.
By car or train, the actual journey to Mladá Boleslav is certainly longer, as only the direct route (as the crow flies) between Slavkov u Brna and Mladá Boleslav has been calculated here.
Air line (approximately)
199 kilometers
107 nautical miles