The calculated distance (air line) between Český Krumlov and České Budějovice is approximately 13 miles respectively 22 kilometers.
By car or train, the actual journey to České Budějovice is certainly longer, as only the direct route (as the crow flies) between Český Krumlov and České Budějovice has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles