AA 1041 then UA 5191 at O'Hare
Atlanta → Chicago → Lancaster
Timetable, Chicago time
13:07AA 1041 from Atlanta at the gate
08:50UA 5191 to Lancaster leaves the gate
19 h 43 apart on the timetable, overnight
UA 5191 leaves 19 h 43 after AA 1041 arrives on the timetable: more than half a day, so not a connection we count.