UA 792 then DL 3876 at Denver
Washington → Denver → Austin
Timetable, Denver time
10:29UA 792 from Washington at the gate
09:42DL 3876 to Austin leaves the gate
23 h 13 apart on the timetable, overnight
DL 3876 leaves 23 h 13 after UA 792 arrives on the timetable: more than half a day, so not a connection we count.