The calculated distance (air line) between Ilopango and Antiguo Cuscatlán is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Antiguo Cuscatlán is certainly longer, as only the direct route (as the crow flies) between Ilopango and Antiguo Cuscatlán has been calculated here.
Air line (approximately)
16 kilometers
9 nautical miles