AA 2023 then UA 5191 at O'Hare
Washington National → Chicago → Lancaster
Timetable, Chicago time
12:52AA 2023 from Washington National at the gate
08:50UA 5191 to Lancaster leaves the gate
19 h 58 apart on the timetable, overnight
UA 5191 leaves 19 h 58 after AA 2023 arrives on the timetable: more than half a day, so not a connection we count.