AA 4212 then UA 5191 at O'Hare
Providence → Chicago → Lancaster
Timetable, Chicago time
14:20AA 4212 from Providence at the gate
08:50UA 5191 to Lancaster leaves the gate
18 h 30 apart on the timetable, overnight
UA 5191 leaves 18 h 30 after AA 4212 arrives on the timetable: more than half a day, so not a connection we count.