UA 1970 then WN 3621 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
15:20WN 3621 to San Diego leaves the gate
17 h 35 apart on the timetable, overnight
WN 3621 leaves 17 h 35 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.