In addition to the free segments (6 in NA), you can also purchase 2 additional segments as long as you are below the 20 segment total limit -- and you are (this is often good value as these are fully flexible tickets, with free date changes). Remember than NA includes the Caribbean and Latin America (everything north of Panama), so you could fly JFK-AUA or LAX-SJO, etc. The primary limitation is Hawaii is excluded and only 1 transcon non-stop flight.