The calculated distance (air line) between Tepotzotlán and Ecatepec de Morelos is approximately 13 miles respectively 21 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 Tepotzotlán and Ecatepec de Morelos has been calculated here.
Air line (approximately)
21 kilometers
12 nautical miles