The calculated distance (air line) between Castel Maggiore and Zola Predosa is approximately 9 miles respectively 15 kilometers.
By car or train, the actual journey to Zola Predosa is certainly longer, as only the direct route (as the crow flies) between Castel Maggiore and Zola Predosa has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles