AA 5510 then DL 3720 at Atlanta
Washington National → Atlanta → Northwest Arkansas
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
22:40DL 3720 to Northwest Arkansas leaves the gate
23 h 17 apart on the timetable, overnight
DL 3720 leaves 23 h 17 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.