DL 1223 then AA 3962 at Atlanta
Cincinnati Northern Kentucky → Atlanta → Washington National
Timetable, Atlanta time
16:33DL 1223 from Cincinnati Northern Kentucky at the gate
14:24AA 3962 to Washington National leaves the gate
21 h 51 apart on the timetable, overnight
AA 3962 leaves 21 h 51 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.