The calculated distance (air line) between Rychnov nad Kněžnou and Mladá Boleslav is approximately 63 miles respectively 101 kilometers.
By car or train, the actual journey to Mladá Boleslav is certainly longer, as only the direct route (as the crow flies) between Rychnov nad Kněžnou and Mladá Boleslav has been calculated here.
Air line (approximately)
101 kilometers
55 nautical miles