The calculated distance (air line) between Zacatecoluca and Ahuachapán is approximately 72 miles respectively 116 kilometers.
By car or train, the actual journey to Ahuachapán is certainly longer, as only the direct route (as the crow flies) between Zacatecoluca and Ahuachapán has been calculated here.
Air line (approximately)
116 kilometers
62 nautical miles