The calculated distance (air line) between Kostelec nad Orlicí and Mladá Boleslav is approximately 61 miles respectively 98 kilometers.
By car or train, the actual journey to Mladá Boleslav is certainly longer, as only the direct route (as the crow flies) between Kostelec nad Orlicí and Mladá Boleslav has been calculated here.
Air line (approximately)
98 kilometers
53 nautical miles