I am thinking of going to Brazil for the WC. Ultimately, I would like to go to Rio...but would consider flying into Sao Paolo and then adding on a trip to Rio to catch a match and perhaps cut down my trip expenses. Is flying within Brazil inexpensive? MIA-Sao Paolo is going to be added itinerary for American...this is why I am considering it. I know nothing about Sao Paolo other than that it is one of the most populous cities (if not the largest) in S.America....Sincerely, inexperienced Brazilian Tourist.