The calculated distance (air line) between Zacatecoluca and Quezaltepeque is approximately 36 miles respectively 57 kilometers.
By car or train, the actual journey to Quezaltepeque is certainly longer, as only the direct route (as the crow flies) between Zacatecoluca and Quezaltepeque has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles