AA 2146 then CV 251 at O'Hare
Boston → Chicago → Dallas-Fort Worth
Timetable, Chicago time
08:00AA 2146 from Boston at the gate
22:10CV 251 to Dallas-Fort Worth leaves the gate
14 h 10 apart on the timetable
CV 251 leaves 14 h 10 after AA 2146 arrives on the timetable: more than half a day, so not a connection we count.