AA 2423 then UA 5191 at O'Hare
Charlotte → Chicago → Lancaster
Timetable, Chicago time
16:05AA 2423 from Charlotte at the gate
08:50UA 5191 to Lancaster leaves the gate
16 h 45 apart on the timetable, overnight
UA 5191 leaves 16 h 45 after AA 2423 arrives on the timetable: more than half a day, so not a connection we count.