DL 1668 then DL 100 at Atlanta
Indianapolis → Atlanta → Madrid
Timetable, Atlanta time
22:00DL 1668 from Indianapolis at the gate
21:00DL 100 to Madrid leaves the gate
23 h apart on the timetable, overnight
DL 100 leaves 23 h after DL 1668 arrives on the timetable: more than half a day, so not a connection we count.