AA 642 then UA 6011 at O'Hare
Dallas-Fort Worth → Chicago → Salt Lake City
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
12:40UA 6011 to Salt Lake City leaves the gate
23 h 30 apart on the timetable, overnight
UA 6011 leaves 23 h 30 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.