AA 642 then UA 4568 at O'Hare
Dallas-Fort Worth → Chicago → State College
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
10:25UA 4568 to State College leaves the gate
21 h 15 apart on the timetable, overnight
UA 4568 leaves 21 h 15 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.