DL 4011 then DL 3876 at Denver
Atlanta → Denver → Austin
Timetable, Denver time
11:30DL 4011 from Atlanta at the gate
09:42DL 3876 to Austin leaves the gate
22 h 12 apart on the timetable, overnight
DL 3876 leaves 22 h 12 after DL 4011 arrives on the timetable: more than half a day, so not a connection we count.