UA 3011 then AA 555 at Houston
São Paulo → Houston → Chicago
Timetable, Houston time
06:36UA 3011 from São Paulo at the gate
18:55AA 555 to Chicago leaves the gate
12 h 19 apart on the timetable
AA 555 leaves 12 h 19 after UA 3011 arrives on the timetable: more than half a day, so not a connection we count.