AA 359 then UA 5191 at O'Hare
Washington National → Chicago → Lancaster
Timetable, Chicago time
16:08AA 359 from Washington National at the gate
08:50UA 5191 to Lancaster leaves the gate
16 h 42 apart on the timetable, overnight
UA 5191 leaves 16 h 42 after AA 359 arrives on the timetable: more than half a day, so not a connection we count.