The calculated distance (air line) between Guatajiagua and Zacatecoluca is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Zacatecoluca is certainly longer, as only the direct route (as the crow flies) between Guatajiagua and Zacatecoluca has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles