The calculated distance (air line) between San Agustín Acasaguastlán and Cobán is approximately 45 miles respectively 73 kilometers.
By car or train, the actual journey to Cobán is certainly longer, as only the direct route (as the crow flies) between San Agustín Acasaguastlán and Cobán has been calculated here.
Air line (approximately)
73 kilometers
39 nautical miles