The calculated distance (air line) between Rychnov nad Kněžnou and Prostějov is approximately 61 miles respectively 98 kilometers.
By car or train, the actual journey to Prostějov is certainly longer, as only the direct route (as the crow flies) between Rychnov nad Kněžnou and Prostějov has been calculated here.
Air line (approximately)
98 kilometers
53 nautical miles