AA 642 then UA 3286 at O'Hare
Dallas-Fort Worth → Chicago → Greenville-Spartanburg
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
10:34UA 3286 to Greenville-Spartanburg leaves the gate
21 h 24 apart on the timetable, overnight
UA 3286 leaves 21 h 24 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.