AA 5510 then DL 2435 at Atlanta
Washington National → Atlanta → Melbourne (Florida)
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
21:41DL 2435 to Melbourne (Florida) leaves the gate
22 h 18 apart on the timetable, overnight
DL 2435 leaves 22 h 18 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.