The calculated distance (air line) between San Marcos Huixtoco and Iztapalapa is approximately 14 miles respectively 22 kilometers.
By car or train, the actual journey to Iztapalapa is certainly longer, as only the direct route (as the crow flies) between San Marcos Huixtoco and Iztapalapa has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles