The calculated distance (air line) between Ecatepec de Morelos and Tlalnepantla is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Tlalnepantla is certainly longer, as only the direct route (as the crow flies) between Ecatepec de Morelos and Tlalnepantla has been calculated here.
Air line (approximately)
16 kilometers
9 nautical miles