AA 3075 then UA 3907 at O'Hare
Los Angeles → Chicago → Cleveland
Timetable, Chicago time
16:34AA 3075 from Los Angeles at the gate
07:30UA 3907 to Cleveland leaves the gate
14 h 56 apart on the timetable, overnight
UA 3907 leaves 14 h 56 after AA 3075 arrives on the timetable: more than half a day, so not a connection we count.