DL 1147 then AA 3962 at Atlanta
Chicago O'Hare → Atlanta → Washington National
Timetable, Atlanta time
14:29DL 1147 from Chicago O'Hare at the gate
14:24AA 3962 to Washington National leaves the gate
23 h 55 apart on the timetable, overnight
AA 3962 leaves 23 h 55 after DL 1147 arrives on the timetable: more than half a day, so not a connection we count.