AA 2363 then UA 5191 at O'Hare
Denver → Chicago → Lancaster
Timetable, Chicago time
16:00AA 2363 from Denver at the gate
08:50UA 5191 to Lancaster leaves the gate
16 h 50 apart on the timetable, overnight
UA 5191 leaves 16 h 50 after AA 2363 arrives on the timetable: more than half a day, so not a connection we count.