The calculated distance (air line) between Santa Lucía Milpas Altas and Coatepeque is approximately 80 miles respectively 129 kilometers.
By car or train, the actual journey to Coatepeque is certainly longer, as only the direct route (as the crow flies) between Santa Lucía Milpas Altas and Coatepeque has been calculated here.
Air line (approximately)
129 kilometers
69 nautical miles