AA 4583 then UA 5618 at O'Hare
Raleigh-Durham → Chicago → Washington National
Timetable, Chicago time
15:34AA 4583 from Raleigh-Durham at the gate
14:00UA 5618 to Washington National leaves the gate
22 h 26 apart on the timetable, overnight
UA 5618 leaves 22 h 26 after AA 4583 arrives on the timetable: more than half a day, so not a connection we count.