AA 5503 then DL 1720 at Atlanta
Washington National → Atlanta → Tampa
Timetable, Atlanta time
16:16AA 5503 from Washington National at the gate
13:45DL 1720 to Tampa leaves the gate
21 h 29 apart on the timetable, overnight
DL 1720 leaves 21 h 29 after AA 5503 arrives on the timetable: more than half a day, so not a connection we count.