UA 2296 then DL 5875 at Boston
Chicago O'Hare → Boston → Pittsburgh
Timetable, Boston time
00:46UA 2296 from Chicago O'Hare at the gate
15:00DL 5875 to Pittsburgh leaves the gate
14 h 14 apart on the timetable
DL 5875 leaves 14 h 14 after UA 2296 arrives on the timetable: more than half a day, so not a connection we count.