DL 1668 then DL 1335 at Atlanta
Indianapolis → Atlanta → Austin
Timetable, Atlanta time
22:00DL 1668 from Indianapolis at the gate
21:55DL 1335 to Austin leaves the gate
23 h 55 apart on the timetable, overnight
DL 1335 leaves 23 h 55 after DL 1668 arrives on the timetable: more than half a day, so not a connection we count.