The calculated distance (air line) between Nový Bydžov and Mladá Boleslav is approximately 28 miles respectively 46 kilometers.
By car or train, the actual journey to Mladá Boleslav is certainly longer, as only the direct route (as the crow flies) between Nový Bydžov and Mladá Boleslav has been calculated here.
Air line (approximately)
46 kilometers
25 nautical miles