UA 1970 then UA 5763 at San Francisco
Cleveland → San Francisco → Ontario
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
16:19UA 5763 to Ontario leaves the gate
18 h 34 apart on the timetable, overnight
UA 5763 leaves 18 h 34 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.