Jet to South America from around the U.S. with fares starting at $299 roundtrip, including taxes and fees.
Travel April 1 - June 8 with this LAN Airlines sale, which slashes as much as 45% off competing airlines' prices for the same routes.
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.