The calculated distance (air line) between Olot and Cassà de la Selva is approximately 28 miles respectively 46 kilometers.
By car or train, the actual journey to Cassà de la Selva is certainly longer, as only the direct route (as the crow flies) between Olot and Cassà de la Selva has been calculated here.
Air line (approximately)
46 kilometers
25 nautical miles