The calculated distance (air line) between Soběslav and Mladá Boleslav is approximately 80 miles respectively 129 kilometers.
By car or train, the actual journey to Mladá Boleslav is certainly longer, as only the direct route (as the crow flies) between Soběslav and Mladá Boleslav has been calculated here.
Air line (approximately)
129 kilometers
69 nautical miles