The calculated distance (air line) between Cuscatancingo and Ahuachapán is approximately 46 miles respectively 75 kilometers.
By car or train, the actual journey to Ahuachapán is certainly longer, as only the direct route (as the crow flies) between Cuscatancingo and Ahuachapán has been calculated here.
Air line (approximately)
75 kilometers
40 nautical miles