DL 1867 then DL 2815 at Atlanta
St. George → Atlanta → Key West
Timetable, Atlanta time
19:50DL 1867 from St. George at the gate
18:08DL 2815 to Key West leaves the gate
22 h 18 apart on the timetable, overnight
DL 2815 leaves 22 h 18 after DL 1867 arrives on the timetable: more than half a day, so not a connection we count.