AA 3962 then DL 1266 at Atlanta
Washington National → Atlanta → West Palm Beach
Timetable, Atlanta time
13:54AA 3962 from Washington National at the gate
07:00DL 1266 to West Palm Beach leaves the gate
17 h 06 apart on the timetable, overnight
DL 1266 leaves 17 h 06 after AA 3962 arrives on the timetable: more than half a day, so not a connection we count.