The calculated distance (air line) between San Antonio de los Baños and Guanabacoa is approximately 21 miles respectively 33 kilometers.
By car or train, the actual journey to Guanabacoa is certainly longer, as only the direct route (as the crow flies) between San Antonio de los Baños and Guanabacoa has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles