AA 2230 then Y4 7921 at Houston
Miami → Houston → Morelia
Timetable, Houston time
23:58AA 2230 from Miami at the gate
18:32Y4 7921 to Morelia leaves the gate
18 h 34 apart on the timetable, overnight
Y4 7921 leaves 18 h 34 after AA 2230 arrives on the timetable: more than half a day, so not a connection we count.