The calculated distance (air line) between Rychnov nad Kněžnou and České Budějovice is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to České Budějovice is certainly longer, as only the direct route (as the crow flies) between Rychnov nad Kněžnou and České Budějovice has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles