DL 1247 then DL 600 at Atlanta
Chicago O'Hare → Atlanta → Grand Cayman
Timetable, Atlanta time
09:55DL 1247 from Chicago O'Hare at the gate
09:43DL 600 to Grand Cayman leaves the gate
23 h 48 apart on the timetable, overnight
DL 600 leaves 23 h 48 after DL 1247 arrives on the timetable: more than half a day, so not a connection we count.