AA 5510 then DL 1892 at Atlanta
Washington National → Atlanta → Chattanooga
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
14:30DL 1892 to Chattanooga leaves the gate
15 h 07 apart on the timetable, overnight
DL 1892 leaves 15 h 07 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.