The calculated distance (air line) between San Luis Jilotepeque and Retalhuleu is approximately 131 miles respectively 211 kilometers.
By car or train, the actual journey to Retalhuleu is certainly longer, as only the direct route (as the crow flies) between San Luis Jilotepeque and Retalhuleu has been calculated here.
Air line (approximately)
211 kilometers
114 nautical miles