DL 3176 then DL 1397 at Atlanta
Mobile → Atlanta → Austin
Timetable, Atlanta time
14:24DL 3176 from Mobile at the gate
14:11DL 1397 to Austin leaves the gate
23 h 47 apart on the timetable, overnight
DL 1397 leaves 23 h 47 after DL 3176 arrives on the timetable: more than half a day, so not a connection we count.