The calculated distance (air line) between Tepeaca and Ecatepec de Morelos is approximately 88 miles respectively 141 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 Tepeaca and Ecatepec de Morelos has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles