The calculated distance (air line) between Torre del Greco and San Gennaro Vesuviano is approximately 10 miles respectively 15 kilometers.
By car or train, the actual journey to San Gennaro Vesuviano is certainly longer, as only the direct route (as the crow flies) between Torre del Greco and San Gennaro Vesuviano has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles