UA 1970 then AS 1457 at San Francisco
Cleveland → San Francisco → Los Angeles
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
16:51AS 1457 to Los Angeles leaves the gatealso DE 5031, IB 7298
19 h 06 apart on the timetable, overnight
AS 1457 leaves 19 h 06 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.