The calculated distance (air line) between Ecatepec de Morelos and Cuautla is approximately 55 miles respectively 89 kilometers.
By car or train, the actual journey to Cuautla is certainly longer, as only the direct route (as the crow flies) between Ecatepec de Morelos and Cuautla has been calculated here.
Air line (approximately)
89 kilometers
48 nautical miles