The calculated distance (air line) between Lomas de San Sebastián and Tlalnepantla is approximately 20 miles respectively 33 kilometers.
By car or train, the actual journey to Tlalnepantla is certainly longer, as only the direct route (as the crow flies) between Lomas de San Sebastián and Tlalnepantla has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles