Jet to South America from San Francisco with fares starting at $799 roundtrip, including taxes and fees.
Travel Aug. 15 - Dec. 5 with this LAN Airlines special, which slashes as much as $700 off competing airlines' prices for the same routes. Flights to Colombia, Peru, Ecuador, Argentina, Brazil, Uruguay and Chile are part of the sale.
Fly Mondays-Thursdays for the best deals; these include (roundtrip, with taxes and fees):
Two checked bags, drinks (including some alcohol), meals and snacks are included. The airline is part of the oneworld alliance, so LAN passengers can earn AAdvantage miles.