The calculated distance (air line) between Zafferana Etnea and Trecastagni is approximately 5 miles respectively 7 kilometers.
By car or train, the actual journey to Trecastagni is certainly longer, as only the direct route (as the crow flies) between Zafferana Etnea and Trecastagni has been calculated here.
Air line (approximately)
7 kilometers
4 nautical miles