UA 3426 then AA 5229 at Charlotte
Chicago O'Hare → Charlotte → Harrisburg
Timetable, Charlotte time
09:46UA 3426 from Chicago O'Hare at the gate
08:30AA 5229 to Harrisburg leaves the gate
22 h 44 apart on the timetable, overnight
AA 5229 leaves 22 h 44 after UA 3426 arrives on the timetable: more than half a day, so not a connection we count.