The calculated distance (air line) between Santo Tomás La Unión and Malacatán is approximately 47 miles respectively 76 kilometers.
By car or train, the actual journey to Malacatán is certainly longer, as only the direct route (as the crow flies) between Santo Tomás La Unión and Malacatán has been calculated here.
Air line (approximately)
76 kilometers
41 nautical miles