DL 8843 then DL 468 at Atlanta
Washington → Atlanta → New York LaGuardia
Timetable, Atlanta time
02:39DL 8843 from Washington at the gate
19:30DL 468 to New York LaGuardia leaves the gate
16 h 51 apart on the timetable
DL 468 leaves 16 h 51 after DL 8843 arrives on the timetable: more than half a day, so not a connection we count.