DL 1668 then DL 589 at Atlanta
Indianapolis → Atlanta → Mexico City
Timetable, Atlanta time
21:54DL 1668 from Indianapolis at the gate
19:12DL 589 to Mexico City leaves the gate
21 h 18 apart on the timetable, overnight
DL 589 leaves 21 h 18 after DL 1668 arrives on the timetable: more than half a day, so not a connection we count.