DL 1668 then DL 3093 at Atlanta
Indianapolis → Atlanta → Louisville
Timetable, Atlanta time
22:00DL 1668 from Indianapolis at the gate
19:15DL 3093 to Louisville leaves the gate
21 h 15 apart on the timetable, overnight
DL 3093 leaves 21 h 15 after DL 1668 arrives on the timetable: more than half a day, so not a connection we count.