The calculated distance (air line) between Tlalnepantla and Melchor Ocampo is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Melchor Ocampo is certainly longer, as only the direct route (as the crow flies) between Tlalnepantla and Melchor Ocampo has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles