AA 3067 then UA 5191 at O'Hare
Boston → Chicago → Lancaster
Timetable, Chicago time
14:02AA 3067 from Boston at the gate
08:50UA 5191 to Lancaster leaves the gate
18 h 48 apart on the timetable, overnight
UA 5191 leaves 18 h 48 after AA 3067 arrives on the timetable: more than half a day, so not a connection we count.