<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by writetorich:
CO does not service Argentina. They are the cheapest to Brasil as LemonThrower astutely points out.
Welcome to FT!</font>
Even though CO doesn't offer service to EZE, you can still book a code share flight w/a CO airline partner, Copa for 35K miles.
You'll definately have to transfer in Panama City to a CO flight, because Copa doesn't have a route to EWR/NYC.