DL 1264 then DL 1374 at Atlanta
Chicago O'Hare → Atlanta → Louisville
Timetable, Atlanta time
08:28DL 1264 from Chicago O'Hare at the gate
07:45DL 1374 to Louisville leaves the gate
23 h 17 apart on the timetable, overnight
DL 1374 leaves 23 h 17 after DL 1264 arrives on the timetable: more than half a day, so not a connection we count.