AA 808 then UA 5191 at O'Hare
Washington National → Chicago → Lancaster
Timetable, Chicago time
14:29AA 808 from Washington National at the gate
08:50UA 5191 to Lancaster leaves the gate
18 h 21 apart on the timetable, overnight
UA 5191 leaves 18 h 21 after AA 808 arrives on the timetable: more than half a day, so not a connection we count.