AA 1285 then UA 5191 at O'Hare
Dallas-Fort Worth → Chicago → Lancaster
Timetable, Chicago time
16:16AA 1285 from Dallas-Fort Worth at the gate
08:50UA 5191 to Lancaster leaves the gate
16 h 34 apart on the timetable, overnight
UA 5191 leaves 16 h 34 after AA 1285 arrives on the timetable: more than half a day, so not a connection we count.