United has round-trip flights from Dallas (DFW) to Sao Paulo or Rio de Janeiro (GRU, GIG) for $615-$697 with a connection. Sao Paulo flights May, June, September, and October. Rio flights June and September. Very few extended weekends available.
Read More Cheap Flights: Dallas to Sao Paulo or Rio de Janeiro $615-$697 r/t [Dates vary, read post] – United