AA 642 then UA 3600 at O'Hare
Dallas-Fort Worth → Chicago → Raleigh-Durham
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
09:05UA 3600 to Raleigh-Durham leaves the gate
19 h 55 apart on the timetable, overnight
UA 3600 leaves 19 h 55 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.