The calculated distance (air line) between León de los Aldama and San Diego de la Unión is approximately 57 miles respectively 91 kilometers.
By car or train, the actual journey to San Diego de la Unión is certainly longer, as only the direct route (as the crow flies) between León de los Aldama and San Diego de la Unión has been calculated here.
Air line (approximately)
91 kilometers
49 nautical miles