In 1919, Pierre Georges Latécoère conceived the project of a French-South American air link to transport mail rapidly from Toulouse-Montaudran to Santiago de Chile.

The first Toulouse-Casablanca section was the most accessible. But with Salmson planes coming out of the war, at a speed of 120km/h, without any navigation device and which could only fly during the day, this accessibility became quite relative. They took off from Montaudran, flew at an altitude of about 200 m, following the trees of the Canal du Midi to Narbonne and then the Mediterranean coast to Perpignan.