The calculated distance (air line) between San Marcos de León and Naucalpan de Juárez is approximately 148 miles respectively 239 kilometers.
By car or train, the actual journey to Naucalpan de Juárez is certainly longer, as only the direct route (as the crow flies) between San Marcos de León and Naucalpan de Juárez has been calculated here.
Air line (approximately)
239 kilometers
129 nautical miles