The calculated distance (air line) between San Miguel Ajusco and Iztapalapa is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Iztapalapa is certainly longer, as only the direct route (as the crow flies) between San Miguel Ajusco and Iztapalapa has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles