AA 3580 then UA 5191 at O'Hare
Louisville → Chicago → Lancaster
Timetable, Chicago time
13:30AA 3580 from Louisville at the gate
08:50UA 5191 to Lancaster leaves the gate
19 h 20 apart on the timetable, overnight
UA 5191 leaves 19 h 20 after AA 3580 arrives on the timetable: more than half a day, so not a connection we count.