Reido
Difficult. You would most likely need the right to live & work in said country; residence visas for most Latam countries are generally only issued to foreigners with existing jobs or job offers (expats, diplomats etc....)
Most airlines down there recruit from each other and the armed forces; they are badly run, and are incurring some sizeable losses (Lanchile & now Aerolineas being notable exceptions).
Definitely some lovely places to live in (Bahia, Buenos Aires & others), but difficult to get anywhere as an airline pilot.
rgds