DL 926 then DL 1472 at Atlanta
Washington National → Atlanta → Key West
Timetable, Atlanta time
12:09DL 926 from Washington National at the gate
11:07DL 1472 to Key West leaves the gate
22 h 58 apart on the timetable, overnight
DL 1472 leaves 22 h 58 after DL 926 arrives on the timetable: more than half a day, so not a connection we count.