AA 642 then AA 1976 at O'Hare
Dallas-Fort Worth → Chicago → Puerto Vallarta
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
10:41AA 1976 to Puerto Vallarta leaves the gate
21 h 31 apart on the timetable, overnight
AA 1976 leaves 21 h 31 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.