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