The calculated distance (air line) between San Gaspar Tlahuelilpan and Naucalpan de Juárez is approximately 26 miles respectively 41 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 Gaspar Tlahuelilpan and Naucalpan de Juárez has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles