The calculated distance (air line) between Santa Catarina Ixtahuacán and Retalhuleu is approximately 28 miles respectively 45 kilometers.
By car or train, the actual journey to Retalhuleu is certainly longer, as only the direct route (as the crow flies) between Santa Catarina Ixtahuacán and Retalhuleu has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles