AA 642 then UA 350 at O'Hare
Dallas-Fort Worth → Chicago → Philadelphia
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
11:03UA 350 to Philadelphia leaves the gate
21 h 53 apart on the timetable, overnight
UA 350 leaves 21 h 53 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.