The calculated distance (air line) between León de los Aldama and Unión de San Antonio is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Unión de San Antonio is certainly longer, as only the direct route (as the crow flies) between León de los Aldama and Unión de San Antonio has been calculated here.
Air line (approximately)
34 kilometers
19 nautical miles