The calculated distance (air line) between Rychnov nad Kněžnou and Tábor is approximately 89 miles respectively 143 kilometers.
By car or train, the actual journey to Tábor is certainly longer, as only the direct route (as the crow flies) between Rychnov nad Kněžnou and Tábor has been calculated here.
Air line (approximately)
143 kilometers
77 nautical miles