DL 918 then DL 1472 at Atlanta
Phoenix → Atlanta → Key West
Timetable, Atlanta time
11:25DL 918 from Phoenix at the gate
11:07DL 1472 to Key West leaves the gate
23 h 42 apart on the timetable, overnight
DL 1472 leaves 23 h 42 after DL 918 arrives on the timetable: more than half a day, so not a connection we count.