UA 3905 then DL 1583 at Houston
Cancún → Houston → Salt Lake City
Timetable, Houston time
13:29UA 3905 from Cancún at the gate
07:20DL 1583 to Salt Lake City leaves the gate
17 h 51 apart on the timetable, overnight
DL 1583 leaves 17 h 51 after UA 3905 arrives on the timetable: more than half a day, so not a connection we count.