The calculated distance (air line) between San Andrés Xecul and Retalhuleu is approximately 29 miles respectively 46 kilometers.
By car or train, the actual journey to Retalhuleu is certainly longer, as only the direct route (as the crow flies) between San Andrés Xecul and Retalhuleu has been calculated here.
Air line (approximately)
46 kilometers
25 nautical miles