KJ 248 then DL 588 at Atlanta
Chicago O'Hare → Atlanta → Mexico City
Timetable, Atlanta time
19:54KJ 248 from Chicago O'Hare at the gate
14:28DL 588 to Mexico City leaves the gate
18 h 34 apart on the timetable, overnight
DL 588 leaves 18 h 34 after KJ 248 arrives on the timetable: more than half a day, so not a connection we count.