The calculated distance (air line) between Usulután and Antiguo Cuscatlán is approximately 58 miles respectively 94 kilometers.
By car or train, the actual journey to Antiguo Cuscatlán is certainly longer, as only the direct route (as the crow flies) between Usulután and Antiguo Cuscatlán has been calculated here.
Air line (approximately)
94 kilometers
51 nautical miles