The calculated distance (air line) between San Bartolomé Milpas Altas and Retalhuleu is approximately 67 miles respectively 108 kilometers.
By car or train, the actual journey to Retalhuleu is certainly longer, as only the direct route (as the crow flies) between San Bartolomé Milpas Altas and Retalhuleu has been calculated here.
Air line (approximately)
108 kilometers
58 nautical miles