The calculated distance (air line) between Santiago Cuautlalpan and Ecatepec de Morelos is approximately 16 miles respectively 25 kilometers.
By car or train, the actual journey to Ecatepec de Morelos is certainly longer, as only the direct route (as the crow flies) between Santiago Cuautlalpan and Ecatepec de Morelos has been calculated here.
Air line (approximately)
25 kilometers
14 nautical miles