Secret War in Portugal [1939-1945]
For SOE [British Special Operation Executive] 24 Land was the code name for Portugal

Cabo Ruivo: Clipper terminal

It was not cheap. One may say it was for the very few. Flight from and to America was made by this carrier: New York/Horta/Lisbon. During WW2 it was also a route of escape and the normal way of travel for these who could afford it, besides officials, diplomats and spies.