AA 3239 then UA 3907 at O'Hare
Pittsburgh → Chicago → Cleveland
Timetable, Chicago time
16:54AA 3239 from Pittsburgh at the gate
07:30UA 3907 to Cleveland leaves the gate
14 h 36 apart on the timetable, overnight
UA 3907 leaves 14 h 36 after AA 3239 arrives on the timetable: more than half a day, so not a connection we count.