AA 642 then AA 2305 at O'Hare
Dallas-Fort Worth → Chicago → Washington National
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
12:59AA 2305 to Washington National leaves the gate
23 h 49 apart on the timetable, overnight
AA 2305 leaves 23 h 49 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.