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