The calculated distance (air line) between Sagua de Tánamo and Guantánamo is approximately 30 miles respectively 49 kilometers.
By car or train, the actual journey to Guantánamo is certainly longer, as only the direct route (as the crow flies) between Sagua de Tánamo and Guantánamo has been calculated here.
Air line (approximately)
49 kilometers
26 nautical miles