UA 3905 then UA 410 at Houston
Cancún → Houston → Miami
Timetable, Houston time
13:29UA 3905 from Cancún at the gate
12:15UA 410 to Miami leaves the gate
22 h 46 apart on the timetable, overnight
UA 410 leaves 22 h 46 after UA 3905 arrives on the timetable: more than half a day, so not a connection we count.