AA 3429 then UA 5191 at O'Hare
Cleveland → Chicago → Lancaster
Timetable, Chicago time
13:35AA 3429 from Cleveland at the gate
08:50UA 5191 to Lancaster leaves the gate
19 h 15 apart on the timetable, overnight
UA 5191 leaves 19 h 15 after AA 3429 arrives on the timetable: more than half a day, so not a connection we count.