AA 5510 then DL 3161 at Atlanta
Washington National → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
20:25DL 3161 to Dallas-Fort Worth leaves the gate
21 h 02 apart on the timetable, overnight
DL 3161 leaves 21 h 02 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.