AA 642 then UA 2616 at O'Hare
Dallas-Fort Worth → Chicago → Raleigh-Durham
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
10:32UA 2616 to Raleigh-Durham leaves the gate
21 h 22 apart on the timetable, overnight
UA 2616 leaves 21 h 22 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.