The calculated distance (air line) between Quezaltepeque and Ahuachapán is approximately 39 miles respectively 63 kilometers.
By car or train, the actual journey to Ahuachapán is certainly longer, as only the direct route (as the crow flies) between Quezaltepeque and Ahuachapán has been calculated here.
Air line (approximately)
63 kilometers
34 nautical miles