AA 2500 then UA 5191 at O'Hare
Nashville → Chicago → Lancaster
Timetable, Chicago time
17:25AA 2500 from Nashville at the gate
08:50UA 5191 to Lancaster leaves the gate
15 h 25 apart on the timetable, overnight
UA 5191 leaves 15 h 25 after AA 2500 arrives on the timetable: more than half a day, so not a connection we count.