The calculated distance (air line) between San Pedro Carchá and Amatitlán is approximately 72 miles respectively 117 kilometers.
By car or train, the actual journey to Amatitlán is certainly longer, as only the direct route (as the crow flies) between San Pedro Carchá and Amatitlán has been calculated here.
Air line (approximately)
117 kilometers
63 nautical miles