AA 2023 then UA 4772 at O'Hare
Washington National → Chicago → Columbia Regional
Timetable, Chicago time
12:52AA 2023 from Washington National at the gate
12:45UA 4772 to Columbia Regional leaves the gate
23 h 53 apart on the timetable, overnight
UA 4772 leaves 23 h 53 after AA 2023 arrives on the timetable: more than half a day, so not a connection we count.