UA 1970 then DL 1412 at San Francisco
Cleveland → San Francisco → Seattle
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
14:12DL 1412 to Seattle leaves the gatealso KE 3084, KL 7820, MU 8715
16 h 27 apart on the timetable, overnight
DL 1412 leaves 16 h 27 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.