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