The calculated distance (air line) between Ecatepec de Morelos and San Juan del Río is approximately 81 miles respectively 131 kilometers.
By car or train, the actual journey to San Juan del Río is certainly longer, as only the direct route (as the crow flies) between Ecatepec de Morelos and San Juan del Río has been calculated here.
Air line (approximately)
131 kilometers
71 nautical miles