UA 730 then DL 3876 at Denver
New Orleans → Denver → Austin
Timetable, Denver time
10:14UA 730 from New Orleans at the gate
09:42DL 3876 to Austin leaves the gate
23 h 28 apart on the timetable, overnight
DL 3876 leaves 23 h 28 after UA 730 arrives on the timetable: more than half a day, so not a connection we count.