UA 1970 then UA 1668 at San Francisco
Cleveland → San Francisco → San Diego
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
13:50UA 1668 to San Diego leaves the gatealso AC 4559, NH 7300, VA 8431
16 h 05 apart on the timetable, overnight
UA 1668 leaves 16 h 05 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.