AA 5510 then DL 1229 at Atlanta
Washington National → Atlanta → Fort Lauderdale
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
22:50DL 1229 to Fort Lauderdale leaves the gate
23 h 27 apart on the timetable, overnight
DL 1229 leaves 23 h 27 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.