The calculated distance (air line) between Isola di Capo Rizzuto and Catania is approximately 149 miles respectively 240 kilometers.
By car or train, the actual journey to Catania is certainly longer, as only the direct route (as the crow flies) between Isola di Capo Rizzuto and Catania has been calculated here.
Air line (approximately)
240 kilometers
130 nautical miles