AA 642 then AA 2762 at O'Hare
Dallas-Fort Worth → Chicago → Denver
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
09:45AA 2762 to Denver leaves the gate
20 h 35 apart on the timetable, overnight
AA 2762 leaves 20 h 35 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.