AA 642 then UA 6079 at O'Hare
Dallas-Fort Worth → Chicago → Joplin
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
07:59UA 6079 to Joplin leaves the gate
18 h 49 apart on the timetable, overnight
UA 6079 leaves 18 h 49 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.