The calculated distance (air line) between Soyapango and Quezaltepeque is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Quezaltepeque is certainly longer, as only the direct route (as the crow flies) between Soyapango and Quezaltepeque has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles