The calculated distance (air line) between Chalchihuapan and Ecatepec de Morelos is approximately 64 miles respectively 104 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 Chalchihuapan and Ecatepec de Morelos has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles