Jamiel....
AC only flies YYZ-GRU-EZE. This was an old CP route. They do not have any other flights to SA at this time on AC metal.
I leave tomorrow on UA via YYC-DEN-MIA-GIG for $1,400 CDN as AC has slowly raised their cheap seats on the YYZ-GRU route from $1,200 CDN about 18 months ago to over $ 1,800 CDN now !!! And to top it all off.....there are fewer available seats at this price.
Corporate loyalty is one thing.....a 50% fare increase is another.