AA 522 then UA 3874 at O'Hare
Washington National → Chicago → LCQ
Timetable, Chicago time
10:07AA 522 from Washington National at the gate
06:30UA 3874 to LCQ leaves the gate
20 h 23 apart on the timetable, overnight
UA 3874 leaves 20 h 23 after AA 522 arrives on the timetable: more than half a day, so not a connection we count.