UA 1853 then AA 136 at LAX
Cleveland → Los Angeles → London
Timetable, Los Angeles time
20:27UA 1853 from Cleveland at the gate
18:30AA 136 to London leaves the gate
22 h 03 apart on the timetable, overnight
AA 136 leaves 22 h 03 after UA 1853 arrives on the timetable: more than half a day, so not a connection we count.