UA 3902 then AA 5132 at Houston
Toronto → Houston → Dallas-Fort Worth
Timetable, Houston time
08:27UA 3902 from Toronto at the gate
05:00AA 5132 to Dallas-Fort Worth leaves the gate
20 h 33 apart on the timetable, overnight
AA 5132 leaves 20 h 33 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.