The calculated distance (air line) between Ecatepec de Morelos and Tlaxcala is approximately 59 miles respectively 96 kilometers.
By car or train, the actual journey to Tlaxcala is certainly longer, as only the direct route (as the crow flies) between Ecatepec de Morelos and Tlaxcala has been calculated here.
Air line (approximately)
96 kilometers
52 nautical miles