AA 5510 then DL 1602 at Atlanta
Washington National → Atlanta → Santa Ana
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
20:25DL 1602 to Santa Ana leaves the gate
21 h 02 apart on the timetable, overnight
DL 1602 leaves 21 h 02 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.