UA 1224 then AA 1612 at LAX
Cleveland → Los Angeles → Philadelphia
Timetable, Los Angeles time
09:12UA 1224 from Cleveland at the gate
09:00AA 1612 to Philadelphia leaves the gate
23 h 48 apart on the timetable, overnight
AA 1612 leaves 23 h 48 after UA 1224 arrives on the timetable: more than half a day, so not a connection we count.