The calculated distance (air line) between San Marcos Yachihuacaltepec and Tlalnepantla is approximately 35 miles respectively 56 kilometers.
By car or train, the actual journey to Tlalnepantla is certainly longer, as only the direct route (as the crow flies) between San Marcos Yachihuacaltepec and Tlalnepantla has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles