UA 3905 then AA 2765 at Houston
Cancún → Houston → Charlotte
Timetable, Houston time
13:29UA 3905 from Cancún at the gate
07:25AA 2765 to Charlotte leaves the gate
17 h 56 apart on the timetable, overnight
AA 2765 leaves 17 h 56 after UA 3905 arrives on the timetable: more than half a day, so not a connection we count.