UA 3011 then AM 471 at Houston
São Paulo → Houston → Mexico City
Timetable, Houston time
06:36UA 3011 from São Paulo at the gate
19:01AM 471 to Mexico City leaves the gate
12 h 25 apart on the timetable
AM 471 leaves 12 h 25 after UA 3011 arrives on the timetable: more than half a day, so not a connection we count.