AA 2054 then DL 5634 at Boston
Chicago O'Hare → Boston → Pittsburgh
Timetable, Boston time
14:31AA 2054 from Chicago O'Hare at the gate
14:15DL 5634 to Pittsburgh leaves the gate
23 h 44 apart on the timetable, overnight
DL 5634 leaves 23 h 44 after AA 2054 arrives on the timetable: more than half a day, so not a connection we count.