AA 4802 then UA 5191 at O'Hare
Harrisburg → Chicago → Lancaster
Timetable, Chicago time
16:35AA 4802 from Harrisburg at the gate
08:50UA 5191 to Lancaster leaves the gate
16 h 15 apart on the timetable, overnight
UA 5191 leaves 16 h 15 after AA 4802 arrives on the timetable: more than half a day, so not a connection we count.