AA 642 then AA 2700 at O'Hare
Dallas-Fort Worth → Chicago → Washington National
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
08:52AA 2700 to Washington National leaves the gate
19 h 42 apart on the timetable, overnight
AA 2700 leaves 19 h 42 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.